Murano Glass Pendants Made to Spec

A Murano pendant is a light whose glass was blown in a furnace on Murano, the island in the Venetian lagoon. A good order for one names the glass technique in Italian and the furnace that blew it.

A blown glass pendant with a teal core inside clear glass over a stone sink in a powder room.

Free Blown or Mold Blown

“Mouth blown” can mean glass shaped freely in the air or glass blown into a mold, and the order should say which. The Metropolitan Museum of Art notes that Roman mold blown storage jars came out uniform in size, shape and volume, and the same logic applies to a set that has to match. Ask for the size range the furnace expects across the set either way. The Met also notes that a mold lasted only until its decoration wore or it broke, so for a set that may need a reorder later, ask how many more pieces the mold can make and whether a new mold would match.

How Do You Know Murano Glass Is Real?

Murano has a mark of origin, Vetro Artistico Murano, set up under a Veneto regional law in 1994 and managed by the Promovetro consortium. Lighting is among the products it covers. Firms are authorized by the Region after inspection, and the label carries the firm’s code. Since 2016 the label has also carried a serial number and a scannable code for the individual piece.

The Region’s list of licensed firms, dated March 2025, did not include Venini or Salviati, two of the island’s best known houses. Both have marked their glass under their own names, Venini with an acid etched stamp on the base, according to Appraisily, an appraisal service, and Salviati with signatures, stamps and labels over the decades, according to the collectors’ reference 20th Century Glass. A missing regional label proves nothing by itself. On a lighting order, put the furnace’s name on the invoice, and use the Region’s list as a directory of furnaces that have accepted its inspection.

The Technique Names to Write on the Order

The Met describes sommerso, Italian for “submerged,” as colored glass coated with clear glass. Its example is a piece Carlo Scarpa designed for Venini around 1934, with gold leaf held in a thick clear layer over a colored base.

The Toledo Museum of Art credits pulegoso to Napoleone Martinuzzi, who developed it in the late 1920s while he was Venini’s artistic director, by adding substances such as bicarbonate of soda or gasoline to the melt. The bubbles leave the glass partly opaque with an uneven surface, so a pulegoso shade diffuses the light. Incalmo demands precision, the Corning Museum of Glass defines it as fusing two or more blown pieces into one, with edges that have to meet at exactly the same diameter, so raise it early when asking for a quote.

The Color Is Made in the Furnace

Much of the color in Murano glass is made at the furnace, in the molten glass itself or in colored layers like the sommerso core. The Museum of Fine Arts, Boston’s materials database notes that gold ruby glass, colored with colloidal gold, changes shade with the temperature at which the glass is worked. A color chip can’t stand in for the glass, then. Approve a blown sample, and ask the furnace to keep it as the color standard for production.

Who Makes a Custom Murano Pendant

At Venice Glass Week in 2026, twelve chandeliers paired designers and artists with Murano glassmakers, among them Norman Foster with Salviati and Bethan Laura Wood with Gambaro & Tagliapietra. A custom pendant can follow the same split, the designer brings a dimensioned drawing, and a named furnace makes it.

Among the firms on the Region’s list is Signoretto Lampadari, a family run chandelier maker on Murano that customizes pieces to each client’s needs, according to its profile on Venice Original, a Venetian artisan sales site.

Close view of layered blown glass.

What the Code Requires

The U.S. National Electrical Code requires light fixtures to be listed by a Nationally Recognized Testing Laboratory such as UL, Intertek (ETL) or CSA, so ask whether the finished fixture will carry a listing and get the answer on paper before the deposit. The code also requires a fixture over 50 pounds to have its own support unless the ceiling box is listed and marked for that weight, so get the finished weight from the furnace before the ceiling is framed.

Keep the Paper With the Glass

Hand the invoice and the label’s code, if the piece has one, to the client at the close of the job. They are what a future owner or restorer will have to go on.

*Any Murano furnaces that make lighting can reach me through the contact page.

Security Cameras Built Into the House

Concealed security cameras on a fine home are set into the architecture while it’s being built, in a soffit or a gate pier made to hold them, so nobody bolts a camera to the facade later. The choices that make a camera disappear get made while the walls are still open. So do two decisions most projects leave to the installer, where the footage is kept, and whether the camera is allowed to listen.

Security camera built into the carved limestone cap of a courtyard gate.

Decide What the House Should See

Beyond Audio, a Scottsdale integrator, writes that the first decision in any surveillance design is what the cameras should see and what they shouldn’t. The perimeter gets covered, meaning every entry point and the approach from the drive, while living spaces are generally left out.

David Hornung, cofounder of the design firm D&J Concepts, argues in Social Life Magazine that visible cameras and keypads communicate anxiety rather than protection. He describes biometric readers hidden in door hardware that looks entirely traditional. On a facade someone spent a year detailing, I’d let the gate and the lighting do the deterring.

Where Should Cameras Go on a New House?

The Scottsdale firm lays out coverage from the property footprint before anyone settles on a camera count. Blind spots collect at building corners and behind planting that blocks a sightline. The back of the house needs the same care, since a hedge planted for privacy also takes away the street’s view of a rear gate.

The Box Behind the Camera

Camera makers sell plates and back boxes that seat a camera over a standard junction box, and Axis, for one, lists each plate by the camera models it fits. So the mount gets chosen before the soffit closes or the stone is set. The box goes in at rough in, with extra cable coiled behind it.

LA Techs, an integrator writing about its own projects, puts it bluntly, invisible cameras can’t be retrofitted into finished architecture. Ask the integrator to mark every box on the electrical plan with the camera model it was set for.

A Housing Worth Commissioning

On one property LA Techs describes, the gate cameras were built into the pillar caps and the exterior cameras sat in custom housings matched to the trim profile. That’s work for a stone carver or a metal fabricator, and it’s the kind of commission I want this site to help designers find.

The maker needs the camera, or its drawings, before cutting anything. Have the integrator confirm in writing how much opening the lens and its night illuminator need.

Night Is When It Has to Work

Beyond Audio notes that most security incidents happen at night, so low light performance matters more than resolution. A 4K camera with a noisy night image is less useful than a 2MP camera engineered for the dark. Planned together with the landscape lighting, a motion event at the gate can also turn on the entry lights.

Footage That Stays in the House

Cloud recording fails when the internet does, which is often the moment the footage matters most. Beyond Audio designs around a local network video recorder that keeps recording either way, with a cellular link for remote access and offsite backup if the main line is cut.

Home Automation US, a smart home publisher, notes that hybrid systems also keep a copy offsite in case a thief leaves with the recorder. Give the recorder a cabinet that vents and locks, and ask the integrator how much heat it gives off before the millwork is designed.

Is It Legal for a Security Camera to Record Audio?

In California, Penal Code § 632 makes it illegal to record a confidential conversation without everyone’s consent, and that reaches cameras with microphones. Illinois and Washington are among the other states with all party consent rules. The simplest course is to commission the cameras with audio off and let the client’s attorney decide otherwise.

Video needs care too. Beyond Audio applies privacy masking, which blacks out part of the frame, to neighboring windows and the public street whenever a camera sees past the property line.

Walnut millwork cabinet in a back hall opened to show a network video recorder.

Sensors That Don’t Record a Face

For rooms where cameras don’t belong, chipmakers are building radar instead. Asahi Kasei Microdevices, a Japanese maker, began mass producing a millimeter wave radar module meant for bathrooms and bedrooms. It detects a person down to their breathing and never captures an image. Carnegie Mellon researchers found radar couldn’t pick up fine detail such as facial expressions, which is exactly why it suits a private room.

Cameras themselves are opening up as well. Matter, the open smart home standard run by the Connectivity Standards Alliance, added cameras to its specification, with local and remote access and privacy zones built in. It’s worth asking the integrator whether a camera can join other makers’ systems on an open standard, or only works inside its own app.

Build for the Camera After This One

Of everything on the plan, the camera is the piece most likely to be replaced, and the housing and the box behind it will outlast it by years. Size the housing opening with room to spare, and ask for conduit to each camera location so a new cable can be pulled without opening a finished wall. Then the next camera is a swap, and the stone pier and the trim stay exactly as the architect detailed them.

This is general information, not legal or security design advice. Recording laws vary by state; confirm with the client’s attorney and the project’s integrator.

Zellige Comes From Fez and Tetouan

Zellige is fired clay tile cut by hand into small geometric pieces and fitted into mosaic, and Morocco’s own heritage nomination names two traditions of it, Fez and Tetouan. Several importers selling it in the US say it comes from Fez alone. When Morocco’s culture ministry launched the project to nominate it for UNESCO in November 2025, the project covered the zellige of Fez and Tetouan together. Tetouan is the one that gets left out.

Close view of hand cut zellige mosaic, showing chiseled edges and grout lines.

What Is Authentic Zellige Tile?

The word comes from the Arabic verb zalaja, to slide, for the smooth glazed face, and the Spanish and Portuguese word azulejo grew out of it. Historically it meant the mosaic, separately chiseled pieces in different colors, fitted into star patterns and other geometry. In Spain, the same cut technique in monuments like the Alhambra is also called alicatado, from an Arabic verb meaning to cut.

The square glazed tile sold as zellige in the US is field tile, not mosaic, though importers say the squares come out of the same Fez workshops and are trimmed by hand after firing. Importers sell both under the one name, so a spec that only says “zellige” leaves open which one the client is getting. Spanish tiles of the Renaissance borrowed the mosaic patterns, and some modern square tiles are simply painted with them.

Both Traditions Crossed From Granada

M’hamed Benaboud, a professor at Abdelmalek Essaâdi University in Tetouan, traced Tetouan’s zellige to the Alhambra, where he also found tiles known as Fassi, the word for something from Fez. His conclusion, reported by Médias24 in 2022, was that both Moroccan versions came from al-Andalus. Families from Granada who settled in Tetouan after the Castilian conquest in 1492 kept developing the craft on the Moroccan side of the strait. At the 2025 nomination launch, a Casablanca university researcher dated the oldest Fez zellige to the thirteenth century. He named the minaret of the Seffarine madrasa and the Great Mosque of Fez Jdid among the earliest examples.

From the fourteenth century on, zellige was a standard finish for lower walls and floors in the western Islamic world. After the fifteenth century the cut mosaic fell out of fashion in most places, but never in Morocco.

How a Fez Workshop Makes It

Importers who buy from Fez describe the same basic sequence. Clay from the Fez region is soaked, picked clean of stones and branches by hand, pressed into molds and dried in the sun on rooftops. Each tile is glazed on one face, and the most traditional kilns burn olive pits and branches, though at least one importer’s tile is fired with gas. The heat moves unevenly through a traditional kiln, which gives each tile its own shade. One importer notes that lime in the natural clay can leave small pits in the glaze.

Another importer describes three craftsmen behind the tile and calls the last one, the cutter, the most important. He chips the fired tile into its final shape with a hammer. The cut pieces are then fitted face down and grouted into panels, the same method a Granada tour company describes for the Alhambra’s alicatado.

Tetouan Is Rarer and Costs More

Benaboud’s warning was blunt. Fez zellige has spread to Meknes, Rabat, Salé and Marrakech, while Tetouan’s has not, and Tetouan work costs more. With demand shrinking, he said the tradition could disappear without protection. A 2025 study in Anaquel de Estudios Árabes, a journal of Madrid’s Complutense University, traces the decline back to the end of the nineteenth century, as tilework brought from Spain went into Tetouan’s expansion district and its medina.

Tetouan still trains its craftsmen. Dar Sanaa, the city’s school of arts and crafts, was founded in 1919, and its apprentices learn from master artisans in trades that include faience and carved plaster.

Townhouse hallway with a lower wall band of handmade glazed tile beneath lime plaster.

The Mark Covers Fez Only

Morocco’s crafts ministry filed “Zellige de Fès” as a certification mark in the US in 2016, and it was registered. It certifies that the tile comes from the Fes region and that it meets the ministry’s own quality and manufacturing standards. In Morocco, one importer says, the label is issued under Law 133-12 on traditional crafts. It works much like the origin rules that protect Talavera, and a designer can ask for it on the order.

I found no matching mark for Tetouan. For a Tetouan panel, the workshop itself is the provenance, so its name and city belong on the invoice.

The Pattern Goes to the Workshop First

Square field tile is ordered by color and size. Cut mosaic is different, because every piece is cut for one pattern. So a Fez or Tetouan workshop needs the pattern and the wall’s dimensions first, and the colors after. Fez has the larger trade and a mark to ask for, while a Tetouan panel carries the rarer tradition. If you cut zellige in either city, or import it from them, I’d like to hear from you.

Why Horsehair Fabric Runs Narrow

Horsehair fabric is cloth woven with single tail hairs as the weft, laid across a warp of cotton or silk. A tail hair is too short and springy to spin into a continuous yarn, so each one crosses the loom on its own, and its length decides how wide the finished cloth can be. That is why horsehair comes in widths of about two feet, set by the horse rather than the loom.

Study wall upholstered in dark striated fabric, with fine vertical seams.

What Horsehair Fabric Is Made Of

Conservators at The Henry Ford, repairing a footstool from a horsehair parlor set at Greenfield Village, pointed out that every hair sticks out past both edges of the cloth, since none is long enough to travel back through the warp. Product notes from Emil Rotter, a Berlin firm that sells horsehair fabric, put the count at 26 to 42 hairs held in each centimeter of warp, and warn that hairs too short will poke up through the surface. Country Life described the finished cloth as subtly striated, with a sheen like pearl.

Country Life also called it indigestible to moths and reported that it can last a century. The same Henry Ford conservators found old beetle damage on their footstool, likely drawn to the protein in the hair. So a long life is real, and an antique piece still deserves a close look underneath.

How Wide Is Horsehair Fabric?

John Boyd Textiles listed its black and mixed grey cloth at 65 centimeters, about 26 inches. Its white cloth ran 56 centimeters, about 22 inches, because white tail hair is shorter. Any seat back or wall wider than that takes a seam, and the pale colors take more of them.

That matters most on large surfaces, such as the acoustic wall panels Country Life listed among the cloth’s newer uses. Drawn in 26 inch modules, a seam reads as a line someone chose. Drawn without the width in mind, it lands wherever the cloth ran out.

Two Mills Still Weave It

Country Life reported in 2024 that only two horsehair fabric manufacturers remained, John Boyd Textiles in Castle Cary, Somerset, and Le Crin in Challes, in northwestern France. John Boyd, a Scottish merchant, began weaving horsehair in Castle Cary in 1837. Andrew Ure’s 1846 dictionary described the old method, with a child beside the loom presenting each hair to be passed through the warp. The company credits the 1870 Education Act, which sent those children to school, for its move to mechanical looms with a picker that teases out a single hair. Since 1956 it has worked in a former flax mill built in 1870, where 30 of the looms Boyd bought in 1877 were still running, according to the European Route of Industrial Heritage.

Le Crin kept the hand loom. In a 2024 Luxe partner feature on the workshop, its weavers threaded hairs into the shuttle one by one and turned out roughly eight feet of cloth per loom a day. Le Crin’s cloth is sold under Métaphores, part of Hermès’s textile division, which weaves the hair alongside other fibers such as silk and sisal.

Where the Hair Comes From

John Boyd states that its hair comes from live horses, for the best quality cloth. Design Milk, covering a Métaphores furniture collaboration, described Le Crin’s hair as a byproduct of horses bred in Mongolia for transport and farm work. Britannica notes that horsehair is sorted by length, the longest hairs go to fabric, while shorter hair becomes brush bristles or curled stuffing for mattresses. The cloth takes the top of that sort.

Read the Fiber Content Before the Name

The word “horsehair” covers a wide range of cloth. A British upholstery workshop explains that a blend of 68 percent horsehair and 32 percent cotton, like John Boyd’s, is naturally flame retardant. The same blend with polyester in place of the cotton needs a coating on the back to meet British furniture fire rules, and some cloth sold as horsehair carries as little as 10 percent hair. The name also covers haircloth, the stiff interlining tailors put inside suit fronts, which fashion fabric stores sell by the yard as horsehair.

Ask for the exact fiber content and the fire test that applies where the piece will be installed. Then ask which mill wove it. Emil Rotter had its archive patterns reissued for the firm’s centenary without naming a weaver, so the name on a sample is not always the mill’s.

Close-up of a horse’s long tail hair in side light.

A Cloth Still Being Designed

Sir Edwin Lutyens upholstered his 1919 Napoleon chair, now at the V&A, in a black horsehair John Boyd listed as Ermine black. The mill said it was weaving the same cloth on the same loom for the reproductions the Lutyens family makes. Its range ran to nearly 200 fabrics, with custom colors woven from a 20 meter minimum. In 2026 it worked with Kate Aslangul of Oakley Moore on a striped collection, which Oakley Moore described as the mill’s first new horsehair fabric in over twenty years.

If you weave horsehair, or upholster with it, I’d like to see your work.

Let the Width Set the Grid

Horsehair rewards the designer who draws around it. Put the cloth’s width on the elevations before the frame or the wall layout is fixed, so every seam has a planned place. Before the sample is approved, get the fiber content and the mill’s name, since the hair percentage decides whether the cloth needs a fire coating at all.

The French Zinc Bar Is Cast Tin

The counter Parisians call le zinc is a top of cast tin, welded in sections over a body of solid wood. The Institut pour les Savoir-Faire Français, France’s national craft institute, says plainly that these counters are wrongly called zinc. It lists their making as a rare craft and counts only three companies in France still doing it. English speakers would call the metal pewter, though the French word étain covers both pure tin and its alloys. I went looking for where the name came from and found that the popular answer was wrong too.

Bright metal bar top on a newer style counter.

Is a French Zinc Bar Actually Zinc?

Mostly no, and the exceptions explain the name. Many old wine merchants’ counters were covered with a sheet of zinc, the same metal on Paris rooftops. Some tops were zinc plated with tin, and one Belle Époque counter by J. Lescure of Paris sold with exactly that construction. Cast tin counters appeared in the nineteenth century, and the word stuck to them.

The word is older than most people assume. The Trésor de la langue française dates zinc as a name for the counter to 1873, in Zola’s novel Le Ventre de Paris. In 1894 the slang dictionary of Charles Virmaître credited the word to the lead covering the counter, a third metal in a story that already had two.

Where the Melted Counter Story Breaks

A French wire report and the City of Paris website have both repeated the story that zinc is a mangled form of Zinn, the German word for tin. In that version, the name came from the occupation, when counters were melted down for shell parts during the Second World War. Half of it happened. The craft institute confirms that the German army requisitioned many counters for their tin during that war.

The name came first, by close to seventy years. Zola was writing zinc for a counter in 1873, decades before the occupation. I’d rather hand a designer the dated fact than the better story.

How a Tin Counter Is Built

The base is solid wood joinery, often oak, made to fit the exact spot where the counter will stand. Each workshop works to its own tin alloy, and French makers have been barred from adding lead to it since 2000. The metal is melted and poured into steel molds for the decorative front edge, called the bordure. Its profile follows a period such as Art Nouveau or Art Deco, and some workshops still pour into old molds to match a specific era.

The cast pieces are welded together to wrap the body. The top is then planed with progressively finer blades and sanded until the weld lines disappear. A 2021 wire report carried by Médias24 described each counter at Ateliers Nectoux as about a hundred hours of work, poured from pure tin ingots imported from Indonesia.

Three Workshops Left in France

There is no diploma for this work. Cabinetmaking school covers the wooden body, but the tin itself is learned beside people who already know it. After the war, production held on mainly around Paris and the north, with pockets in Lyon and Marseille.

Ateliers Nectoux is the one I could trace by name. Marcel Nectoux opened it in 1930 on rue de Charonne in Paris, and it moved to Puteaux in 1995 and to Dax in 2011. The institute notes that these makers sell to interior architects as well as bars, with orders going abroad, especially to the United States. If I were specifying one, Nectoux is the workshop I’d call first.

Pewter or Zinc for a Kitchen or Bar

The two read differently from across a room. Zinc darkens with use toward a blue gray. Pewter reads brighter. Bastille Metal Works casts both for homes and bars in North America, and ARCHITECT magazine reported its pewter at 99 percent tin and 1 percent copper.

Both are living finishes. The craft institute describes tin as rustproof, but it still takes on a patina over time that warms the look of new metal, much the way unlacquered bronze changes where hands touch it. A client who wants the counter to stay exactly as it looked on install day should choose a different surface. Ask the fabricator to put care guidance in writing before the top ships.

The Lead Question on an Antique Bar

Antique French bars with original tin tops turn up regularly on dealer sites, and that is where the real risk sits. The 2000 ban on lead applies only to counters made since then. In 1860 the Encyclopaedia Britannica recorded that French law allowed pewter of 82 parts tin to 18 parts lead for vessels holding wine and vinegar. No one can tell you what an old counter’s tin holds without testing it.

Idaho’s public health guidance on antiques advises treating old pewter as if it contains lead. Before an old top goes into a kitchen or a working bar, have it tested. For a new top, ask the maker to state the alloy and its lead content in writing.

A Name That Outlived Its Metal

Zinc is the word France kept, and cast tin is the metal its few remaining workshops still pour. The useful habit for a designer is to write the real metal on the drawings, so the fabricator and the client are reading the same thing. That one line on a spec sheet decides whether the counter ages like a Paris bar or like a Paris roof.

How Versailles Parquet Is Built

Versailles parquet is a floor of square oak panels, first built for Louis XIV’s palace in the 1680s. Each panel is a frame holding short pieces laid in an interlaced diagonal pattern. The traditional panel holds together with mortise and tenon joints and wooden pegs, but the name now covers engineered boards, reclaimed oak, stone and vinyl. From a few feet away most of them look alike. Underneath they are different floors, and the difference belongs on the spec before anyone orders.

A long gallery hallway with rammed earth walls and a pale oak parquet floor of square patterned panels.

Oak Replaced Marble at Versailles

The palace had marble floors first. The British flooring company Ecora, quoted by the design site Core77, wrote that floors like these were costly to maintain and damaged the joists and timber frames beneath them. Oak panels laid on the diagonal replaced them, and the Hall of Mirrors is laid that way today, with pieces the French dealer BCA calls navettes set between the squares. Nele Lüttmann, writing for the site Craft Value, traced the copies that followed to the Prussian and Saxon courts, including Augustus the Strong’s Moritzburg Palace in the early 1700s.

The floor in that gallery today is not the 1680s floor. The French trade journal Cahiers Techniques du Bâtiment reported that a restoration program scheduled for 2004 to 2009, with the construction group Vinci as patron, relaid about 750 square meters of oak parquet there. Parqueterie Beau Soleil, a workshop in the Nièvre, says it built those panels in 2007. The paneled walls of rooms like these used the same idea at a larger scale, a frame holding the wood inside it.

How a Traditional Panel Is Joined

A traditional panel uses no glue. Beau Soleil describes its squares and frame pieces as cut for mortise and tenon joints that need none, in panels 23 millimeters thick with a 9 millimeter wear layer. Parqueterie Gagnieu, another French maker, joins the interlaced pieces with tongue and groove and pegs the mortise and tenon joints at the four corners of the frame. It also offers to build panels the way the originals were made, with mortise and tenon throughout.

So two serious French workshops describe the traditional panel differently, and each is describing its own real work. That alone undoes the fixed joint count some dealer sites state as a rule. The useful question for a maker is which joints are pegged and which are tongue and groove. If you build panels this way by hand, I’d like to see how you cut them.

Do Wooden Pegs Prove Traditional Joinery?

No. Beau Soleil, the workshop credited with the Hall of Mirrors panels, sells its own panels with or without decorative pegs. A peg can hold a joint or be there for the look of one, and only the maker can say which.

The pieces inside the frame are worth asking about too. The maker Bohemian Works says it cuts each cross in the pattern from one piece of wood. It says most industrial producers glue separate short pieces together instead, and those can shrink or come loose as humidity changes. That is a maker describing its competitors, so I read it as a question to ask, not a fact about every factory.

What an Engineered Versailles Panel Is

An engineered panel is a layer of oak pieces glued to a plywood base. Parador, a German flooring company, listed one 15 millimeters thick with a 3.5 millimeter oak top layer, and required it to be glued down across the whole floor by a professional. The top layer is the only part that can be sanded, so its thickness decides how many times the floor can be refinished. Sellers listed top layers of roughly 3 to 6 millimeters, against the 9 millimeters Beau Soleil gives for its solid panel.

Sellers of engineered panels list them for underfloor heating. One British retailer’s installation guide still warned that oak pieces set in different directions over plywood react to temperature swings. It asked for the heating to be tested first and brought up gradually. Check the manufacturer’s installation guide for the humidity range the floor needs, and whether the house can hold it through winter.

Old Oak in New Panels

BCA Matériaux Anciens, which sells both antique and new panels, says true antique Versailles parquet is now very rare. What’s offered, it says, is very often new panels made from old oak. That is a real product and often a beautiful one. The Reclaimed Flooring Company described cutting blocks from reclaimed French floorboards and fitting each one by hand to its neighbor, because old oak surfaces are uneven.

Some new oak is made to look old without stain. Pave HDM described a process of seven to ten steps that reacts with the oak’s own tannins and changes the color through the wood rather than on top of it. For a restoration that needs a documented floor, ask the dealer what building the panels came out of. Ask too whether they are original panels or new ones made from old boards.

Close view of an oak parquet panel corner joined with a square wooden peg.

The Pattern Without the Wood

The drawing has also moved into stone. De Ferranti in London sells the Versailles layout in white marble and in near black limestone, and Google’s suggestions for the phrase included vinyl versions. None of these is parquet, and none has a joint inside it.

There’s a second trap in the name. Havwoods, an oak flooring company, separates Versailles parquet from the Versailles tile pattern, which it describes as usually travertine and traditionally used outdoors. Country Floors describes that tile pattern as four stone sizes repeating as a module. A spec that says only “Versailles” can come back as either one.

A Floor Built to Be Lifted Again

A panel held by its own joints is joinery, and old sets still turn up at dealers now and then, lifted out of houses to be laid again somewhere else. An engineered panel glued to a slab is a finish, often a good one, meant to stay where it was laid. Both are honest floors when the spec says which one it is.

That’s the choice to put to the client before any samples come out, a floor of joinery, or a finish carrying the same drawing. The photograph they brought in shows only the drawing.

What a Staircase Is Made Of

A staircase is usually built from several materials at once, each placed where its strengths matter, stone or wood under the foot, and metal or wood along the open side where a hand reaches for it. It is also the one element in a house that can put a stonemason, a joiner, a blacksmith and a tile painter on the same job. I think that makes it the best single place in a home to bring in handwork, as long as each material is chosen for the part of the stair it has to do.

Open air stone staircase in a restored courtyard house with painted blue and white tile risers and a dark iron railing.

Stone Steps Rest on Each Other

The Georgian stone stair that seems to hang off the wall is usually called cantilevered, and stonemasons say the name is wrong. Each step sits on the one below it, so the weight travels down through the stair to the ground, and the steps reach into the wall only a few centimeters. Ian Knapper, a stonemason who specializes in stone staircases, says a truer name is pencheck stair, after the rebate cut along the front bottom edge of each step where the step below locks in. Guy Nordenson’s engineering firm traces the principle to Palladio’s stair at the Accademia in Venice.

The same interlock is the weakness. A structural inspection of the Georgian stone stair at 26 Fitzroy Square in London noted that because the treads lean on one another, the failure of one tread can bring down more than itself. On a new stone stair, the mason and the structural engineer belong in the same meeting. The finish deserves the same care, since a polished stone tread is a slip question before it is a color question.

Wood Treads, Solid or Clad

Wood is the stair builder’s material, and on a stair the cut matters as much as the species. Viewrail, a stair supplier, claimed its quartersawn white oak treads, laminated edge to edge, resist cupping better than virtually any other construction. A cupped tread is more than a cosmetic flaw. It is a trip.

The same supplier also listed Signature treads up to 3 1/2 inches thick built on an engineered core, wrapped in quartersawn white oak on all six sides so no edge grain shows. That is a legitimate product, but it is veneer at stair scale, and the drawings should say which one is wanted, solid laminated stock or a clad core. On a 2025 helical stair for HOD Architects in London, the stair maker Millimetre sleeved oak treads over steel cores, so the wood was the finish and the steel carried the load.

Talavera on the Risers

The riser, the vertical face of each step, takes scuffs from toes and almost no weight, which is why decorative tile too slippery for a tread can go there. Mexican tile importers commonly sell Talavera for risers, and the craft behind it carries its own standing. In 2019 UNESCO inscribed the making of artisanal Talavera in Puebla and Tlaxcala, along with two towns in Spain, on its list of intangible cultural heritage.

Two cautions belong on the drawings. Sellers of handmade Talavera stated that it is not frost proof and turns slippery when wet, so it stays on the risers and off exterior stairs in freezing climates. Some tile sold under the Talavera name for pools and patios is porcelain with the Talavera look, sold as weatherproof and unrelated to the craft. The name on the box is worth checking against how authentic Talavera is certified.

Suspended Stairs Hang From Steel Rods

A suspended stair hangs from the structure above instead of resting on stringers below, and the rods that carry it often serve as the guard too. In a rebuilt worker’s cottage published in 2023, I-Kanda Architects hung 12 oak plywood treads and two landings from the second floor ceiling on 49 steel rods, each an inch thick, the longest 19 feet.

A thin steel bar runs alongside the oak handrail to keep rods that long rigid. The owners said the alternative was thicker rods, which they feared would make the stair look like a cage. Where rods stand in for balusters, their spacing has to meet the same 4 inch opening limit as any guard, and that is worth settling with the engineer before the rod count is fixed.

Hand Forged Railings

A forged balustrade is shaped hot, piece by piece, and it shows. Hammering hot steel changes its grain inside, and on the outside it leaves the marks of the work. Wareham Forge, a blacksmith shop in Canada, left the profile of one railing slightly irregular from the hammer, and on another made each forged eye a little different on purpose.

That irregularity is the reason to commission forging, and the reason to approve the finish in person. On the Millimetre stair, the solid steel balusters were patinated by hand through a sampling process worked out with the client. Blacksmiths who forge railings, I’d welcome a look at how you work.

Pale oak stair treads hung on slim dark steel rods rising to a library mezzanine in a lakefront home, with a leather wrapped wall handrail.

Can a Guard Top Rail Be the Handrail?

Yes, if it is shaped for a hand. Under the International Residential Code, the top of a guard can serve as the handrail on the open side of a stair when it sits 34 to 38 inches above the line of the stair nosings and meets the grip rules. Those rules hold a round rail to 1 1/4 to 2 inches across and require any profile past a set perimeter to have a finger recess on both sides. A flat bar cap or an oversized wood cap is a common failure, which is why a sculptural guard often needs a separate rail.

The code asks for a handrail on at least one side of a flight with four or more risers. I’d draw one on both. Leather is the most tactile option, Spinneybeck listed hand wrapped round rails at 1 1/4 and 1 3/4 inches, inside the grip range, and CLB Architects worked with fabricator Brandner Design to weave a stitched saddle leather strap through steel flat bar rails. The 2024 edition of the residential code also added rules for solid framing at the floor edge where guard posts attach. The change was proposed by the Stairbuilders and Manufacturers Association, whose members found installers showing up once the finishes were in, with no information about the framing behind them.

The Hand Judges It Last

A staircase gets judged twice. Guests see it from across the entry, where stone and iron do their work at a distance, and then they climb it, and the hand on the rail has the last word. What carries the stair, stone resting on stone or treads hanging on rods, is the part guests never notice and the part a mason or fabricator has to get exactly right.

Commissioned work pays off in the details people notice, a painted riser seen from the hall or a leather grip stitched on the underside. The rail is the one part of a stair that everyone who climbs it both looks at and holds.

Sound Isolation in a Custom Home

The building code sets a sound isolation rating for the wall between two condos and none for the wall between a primary suite and a home theater in a detached house. Its sound section covers hotels and apartment buildings, not single family homes. Inside a custom house, the number is whatever the design team decides it is.

Home office closed off from a living room by a steel framed glass wall and a solid oak door.

What Sound Rating Does a House Need?

The International Building Code requires a Sound Transmission Class of 50 between dwelling units, or 45 when the finished assembly is tested in the field, and floors there also need an Impact Insulation Class of 50. The residential code has a sound appendix, but it isn’t mandatory unless a city adopts it, and it only covers walls and floors between dwelling units, such as townhouses.

Commercial Acoustics, a firm that sells soundproofing, lists a stud wall with half inch drywall on each side at STC 30, and 32 with fiberglass batts in the cavity. Its own target for a wall inside a luxury unit is STC 50, with no code minimum behind it. Most of what a client will hear through a bedroom wall lives in the gap between those two numbers.

Two Numbers, Two Kinds of Noise

STC rates airborne sound, such as voices and television carried through the air into a wall. IIC rates impact sound, such as footsteps and dropped objects, which travel through the structure itself. A floor can score well on one and poorly on the other.

Impact matters most where stone or wood floors sit over a bedroom. In Miami condos, a rated acoustic underlayment between the slab and the finish floor is what brings a hard floor up to code. For a custom house, the architecture firm Garret Cord Werner describes a concrete topping slab on a resilient mat, with acoustic insulation in the joist cavity below.

The Rating Stops Before the Bass

STC is calculated from test results between 125 Hz and 4,000 Hz, which covers speech well. Commercial Acoustics notes that a theater’s deep bass sits mostly below 100 Hz, and that walls with high lab ratings often fail on site because those frequencies were never part of the test.

The firm’s answer for theaters is mass combined with decoupling, including double stud framing. For a media room beside a bedroom, I’d ask the acoustical consultant for the test data below 125 Hz, not just the single number.

Built Walls Test Lower Than the Lab

An STC rating comes from a laboratory test of the wall alone. In a finished house, sound also travels by indirect routes, which acousticians call flanking paths, such as shared air ducts and doors to the hall. The building code accepts a field result 5 points below the lab number, and a field test of the finished rooms belongs in the contract wherever the number matters.

Glass needs its own detailing. In a Commercial Acoustics field test of a corporate office, joints where glass met glass were the worst flanking path found. A steel and glass partition around a home office suits a modern house, and I’d still choose one in the right room, as long as its joints are detailed for sound.

Double row of staggered wood studs packed with insulation between two rooms before drywall.

The Door Sets the Limit

Criterion Industries, an Australian maker of acoustic doors, states plainly that standard residential doors are not designed for acoustic performance. A door with a solid core carries far more mass than a hollow one, and mass is what stops airborne sound passing through.

The seals matter as much as the slab. San Francisco’s building code rates an apartment or condo entrance door off a shared hall together with its perimeter seals, at STC 30 or higher. A drop seal hidden in the bottom of the door closes the gap at the floor. A heavy door built to close tight against its seals is a piece of joinery, and this is where a good woodworker earns the commission.

Borrow the Condo Board’s Number

A condo buyer gets a tested sound rating by code, and in Miami most luxury condo boards push the floor requirement to IIC 55 or 60. The same discipline transfers to a house. The targets belong in the drawings room by room, and the primary suite and any bedroom under a stone floor should get theirs first.

Ask the acoustical consultant to name the tested assembly behind each number, the same proof a condo builder hands the building department at plan review.

This is general information, not acoustical design or a code review. Building codes are revised and adopted differently by each city, so confirm requirements with the local building department and the project’s acoustical consultant.

Terrazzo Is Chosen by What’s Under It

Terrazzo is marble or other stone chips set in a binder and ground flat once it cures. The binder matters more than the chips, and on a new project the choice is epoxy or cement. Epoxy wants a flat concrete slab that stays dry. Cement tolerates a slab with moisture coming up through it, and it is the one that goes outdoors.

A restored salon with exposed timber ceiling beams and a continuous terrazzo floor of large stone chips with a darker border.

Epoxy Terrazzo or Cement Terrazzo?

Epoxy accounts for the large majority of interior terrazzo, according to a continuing education course from the National Terrazzo and Mosaic Association, the US trade group. It goes down as a resin layer about 3/8 inch thick and can be tinted to almost any color. Its weak point is the slab. Joshua Boncosky of Concord Terrazzo told Architizer that moisture rising through an old slab with no vapor barrier can break the bond, and that the missing barrier is often found too late. The NTMA’s own guide describes epoxy as a system for interior slabs.

Cement terrazzo is sold as systems sorted by thickness. A monolithic floor bonds straight to the slab with a half inch topping. A sand cushion floor sits free of the slab on an isolation sheet and a dusting of sand, under a mortar bed reinforced with wire, about three inches deep in the NTMA’s guide. That depth rules it out for most renovations, and Cameo Morningstar of Terrazzo & Marble Supply told Architizer that very few tradesmen were still doing cement work at all. Outdoors, the NTMA points to rustic terrazzo, a cement system left textured instead of ground, for pools and patios.

Venice Laid It on Wood

The floors that made terrazzo famous were bound with lime and laid over timber. Historian Giulia Ceriani Sebregondi’s study of Palazzo Donà, built from 1610 to 1612, shows Venetian palaces framed with closely spaced wooden beams to keep weight off the soft ground. Lime gave those floors some flex. Architect Paola Marpillero credits that elasticity with letting the floor adapt to what is under it, and a Houzz guide ties it to bending wooden supports and a city that keeps settling. Cement began replacing lime in the nineteenth century, by Marpillero’s account.

A restored house with timber floors puts the same question to a designer today. How much does the structure deflect, and can the binder move with it? That answer belongs to the structural engineer, and I’d want it in hand before a terrazzo contractor prices the job.

Friulian Hands Built the Trade

On February 9, 1583, the Venetian Council of Ten allowed master Sgualdo Sabadin of Provesano and his fellow Friulian terrazzo workers to found a guild school dedicated to St. Florian. The first chapters of the guild’s statutes followed in September 1586, according to historian Javier Grossutti. Craftsmen from a handful of foothill villages in Friuli, Sequals and Fanna among them, held Venice’s terrazzo trade almost entirely. Grossutti points out that none of those villages was ever where they practiced it.

From the 1830s, he writes, they carried the craft across Europe, and at the turn of the twentieth century to American cities. By 1931, most of the roughly 12,000 Friulians living in the United States worked in mosaic or terrazzo, according to the program for a 2006 study day in Cavasso Nuovo. Giandomenico Facchina, a mosaicist from Sequals, decorated the Paris Opéra and helped many emigrant Friulian terrazzo workers into French work, according to the Friuli mosaic school. Italian names ran through American terrazzo for so long that the NTMA later profiled Grossutti’s research into why.

What Venetian Means on a Spec Sheet

In the NTMA’s data sheet, Venetian terrazzo is a chip size, a coarse mix of #3 to #8 aggregate instead of the usual #1 and #2, in epoxy or cement. The larger stones need a thicker pour, and the sheet notes the slab may need to be recessed to take it. In tile catalogs the phrase is a product name, and several porcelain lines borrow it, the same idea as porcelain slab.

In Venice the word still names a method. Seminato is stone scattered by hand into the fresh bed before the floor is rolled and ground. Brothers Stefano and Marco Vianello lay it in Venetian palaces and teach it, and the Cologni Foundation’s master craftsman register describes Stefano’s work as the dry technique of seminato and rolling. Their Homo Faber profile says the same texture can never be made twice. If you seed terrazzo by hand, in Venice or anywhere else, I’d like to hear from you.

Close view of a terrazzo floor where a thin metal divider strip separates two different stone chip mixes.

The Strips Are There for the Cracks

Metal divider strips became available in the 1920s, according to the Terrazzo Tile and Marble Association of Canada. Their job was to contain cracking by giving the floor room to move, and the earliest strips are said to have been wood, according to the NTMA’s history of the strip. Architizer’s spec guide puts cement terrazzo at three to five foot squares between strips, while epoxy can run twenty or thirty feet. The NTMA’s Venetian sheet adds that the strips must match the height of the stones.

A strip has to land on every joint in the slab below, whatever the pattern says. A border drawn without the slab’s joint plan can end up with a zinc line crossing the room where nobody wanted one. Get that plan from the engineer or contractor before the pattern is final.

Start From the Slab Up

Before a single chip sample comes out, I’d want the slab’s joint plan and an answer on whether moisture comes up through it. On a timber floor, the engineer’s word on deflection matters more than either. Once those are known, the binder mostly chooses itself, and color becomes the easy part. Venice built in that order, timber first and stone last.

Wajima Lacquer Is Made Only in Wajima

Wajima lacquer is urushi, the cured sap of the lacquer tree, laid over an undercoat no other region uses. It’s a raw lacquer mixed with jinoko, a powder of baked diatomaceous earth from Mount Komine, near the city of Wajima on Japan’s Noto Peninsula. That undercoat is what sets it apart from other Japanese lacquer. Japan named Wajima lacquer a traditional craft in 1975, and in 1977 its technique became an Important Intangible Cultural Property. The rules behind those titles also tie the work to the city itself, which matters to anyone commissioning it now.

A restored townhouse dining room with one wall of deep red brown lacquered panels in low evening light.

What Goes Under the Gloss

Fragile edges get cloth before they get color. In a step called nuno-kise, the lacquerer pastes cloth over rims and other parts likely to chip with a mix of raw lacquer and rice paste. Base coats of lacquer and jinoko follow. Each is rubbed on and polished back, three rounds in all, with a finer grade of powder every time. One Wajima lacquer house credits the powder with insulating well and bonding with the lacquer into a strong film.

The standard is specific about materials. A Ministry of Economy, Trade and Industry journal article lists the traditional craft requirements. Two of them are natural lacquer only and a wood base of species such as hiba and keyaki, the Japanese name for zelkova. The Wajima name is also a regional trademark held by the Wajima Lacquerware Cooperative, and it covers goods lacquered inside the city’s boundaries as they stood before a 2006 merger. Its list of goods includes tables and folding screens, but I did not find wall panels on it.

Natural Lacquer Is Not Always Japanese Lacquer

The standard asks for natural lacquer, not lacquer grown in Japan, and the gap between the two is large. News On Japan reported in November 2025 that about 93 percent of the lacquer distributed in Japan was imported from China. Domestic output in 2024 came to 1.8 tons, short of the roughly 2.2 tons a year that restoring the country’s cultural properties requires. A Wajima retailer writes that much of the limited Japanese supply is used in Wajima, and that some lacquer house owners have planted their own trees. When a piece is quoted, I would ask which sap went into the top coats.

Does Urushi Fade in Sunlight?

Urushi does not dry the way paint does. It hardens through oxidative polymerization when thin coats are held at high humidity and a moderate temperature. One Wajima workshop cures its pieces in a closed, humid cabinet called a furo. Once cured, it is tough enough that inns and restaurants have used Wajima ware since the Meiji era.

Light is its weakness. A 2023 study in the Journal of Wood Science notes that both ultraviolet and visible light break urushi down, so its color fades and its gloss dulls. The Denver Art Museum advises keeping lacquer out of direct sun and filtering ultraviolet at the window. For a lacquered wall or door, that decides placement before finish, keep it out of the sun’s path, or specify glass that blocks ultraviolet.

One House Runs Each Commission

Wajima has always split the work. More than 100 steps are shared among specialists, and the wood base and the lacquer coats usually come from different hands. The nushiya, the lacquer house that sells the work, acts as project manager. It takes the client’s brief and hands each stage to a craftsperson, so a designer deals with one house, not a dozen workshops.

Some houses already build at room scale. Wajima Kirimoto, which began as a lacquerware business in the late Edo period, has taken on architectural interior projects and named custom lacquer furniture and interiors as its near-term goals. A feature on the workshop described its Tokyo office with lacquered walls and doors. To the nushiya and woodworkers reading this, if your workshop takes lacquered walls or furniture for clients outside Japan, I would like to hear from you.

A piece of lacquered furniture in a Japanese room.

Why the Work Could Not Move

The trade was shrinking before the ground shook. Wajima lacquer production was worth about 2.4 billion yen in 2022, down more than 80 percent from its 1991 peak, according to the Sankei Shimbun. By October 2026 fewer than 1,000 people worked in it, down from nearly 3,000. The January 1, 2024 earthquake on the Noto Peninsula stopped production completely for a time.

In July 2026, a cooperative representative told Kyodo News that capacity had returned to only about 60 to 70 percent of its level before the earthquake, because some craftspeople had closed their shops or had not come back. With each stage in different hands, a single stage that does not recover slows the whole chain. A manufacturer could move to another town after a disaster, but the traditional craft designation requires the work to be done in Wajima, and anything made elsewhere cannot use the name. The rule that protects the craft is the same rule that kept it from relocating.

A Wajima Order Starts at the Cooperative

A Wajima commission pays for what a photograph cannot show, the cloth at the edges and the earth under the color. The Wajima Lacquerware Cooperative, which holds the trademark, is the first call for finding a nushiya that takes walls or furniture. Every order placed through it goes to craftspeople working in the one city allowed to make it, at a time when the trade is trying to keep them there.

Antique Mirror Walls Are Made New

An antique mirror wall, as the trade sells it, is new glass that has been silvered and then aged so it reads as old plate. Antique mirror is still the name on spec sheets, and it’s what people type when they search for panels and tiles. Two products share that name. In one, a full sheet is aged before anyone cuts it. In the other, each panel is cut first and aged afterward, and the difference shows once the panels meet on a wall.

Library shelves built into the wall, backed with aged mirror panels, lit by evening lamplight.

What the Aging Copies

For centuries, most European mirrors were backed with an amalgam of tin and mercury. An InCollect article on how mirror glass ages describes workers flooding tin on a marble table with mercury, then lowering the glass onto it. That backing never fully settles. Its crystals keep growing and mercury slowly escapes, so old plate darkens and the damage can’t be reversed.

In 1835 the German chemist Justus von Liebig worked out a way to deposit silver on glass, and by the end of that century silver had replaced mercury in industrial mirror making. The search term “mercury glass mirror” borrows its name from somewhere else. The Corning Museum of Glass calls “mercury glass” a mistaken name for nineteenth century silvered glassware, made by sealing a silver solution between the double walls of a vessel.

How Is Antique Mirror Different From Regular Mirror?

It’s the same glass. Dominic Schuster’s guide for designers notes that the antiquing happens on the back, so the glass keeps the qualities of plain mirror. AGC described its antique mirror as getting its look through controlled oxidation of the silver coating, with each pattern unique because every sheet was made by hand. Donghia’s spec sheet for its Ether mirror noted that further oxidation may happen over time, which is worth raising with any supplier before a client signs off.

The base glass matters as much as the finish. Schuster recommends low iron mirror under antiquing because it reflects color accurately. A tinted base changes the reflection, and Dreamwalls by Gardner Glass, in North Carolina, listed its Clear Charcoal antique mirror as its most popular antique pattern on bronze tinted glass.

A Sheet Aged Before It’s Cut

General Glass described its antique mirror as made in Italy and finished by hand through a proprietary oxidation process, stocked as quarter inch sheets roughly four by eight feet. A fabricator cuts it to size like ordinary mirror. The company’s data sheet said to wash cutting lubricant off the back right away, since it can dissolve the protective coating, and to seam the edges after cutting for the warranty to apply.

This is the route Schuster cautions designers about. His guide warns that antique sheets finished first and cut to size afterward look uniform, and that a discerning eye can tell. His own mercury finishes put the aging around each panel’s edges, the way old mercury and silvered plate degraded, and a cut through a sheet aged as a whole can’t do that.

A Panel Aged After It’s Cut

Schuster’s studio in Hampshire, founded in 2011, finishes each panel individually after cutting it to size. His Mercury Sparkle finish is lightly distressed and catches the light in flecks, while Heavy Mercury imitates plate so degraded it reflects very little. Yachts International reported that he sourced glass from England, Belgium, Germany and Mexico, then silvered it by hand.

Safety glass changes the order. Only plain glass can be tempered, so a tempered panel has to be silvered after tempering and antiqued after that, which suits a panel near a fireplace or set into furniture. Edges change the whole wall. Clean cut edges, softened and darkened, butt together square in the traditional way, while polished edges leave a small V between panels and read more contemporary.

Old Plate Is a Separate Purchase

Genuine antique mirror is a different decision. The InCollect article notes that mercury and silver backings were made side by side for decades, so the coating alone can’t date a piece of glass. Old mercury plate also raises a handling question that conservators answer differently. Williamstown Art Conservation Center said amalgam mirrors aren’t a serious source of mercury vapor, while the American Institute for Conservation’s wiki warns that deteriorating amalgam releases liquid and vapor mercury and calls for care in handling. I’d leave any recutting or reframing of old plate to a conservator.

Close view of old mirror glass with dark spotting along its edge.

Wet Rooms Need the Warranty Read First

Moisture is what blackens the silver on ordinary mirror, and antiqued mirror arrives with its silver already partly oxidized. General Glass’s standard mirror warranty asked that mirrors in bathrooms and kitchens be set up off the base, and warned that spray cleaners can puddle at the edges. Tile retailers rate some antique mirror tile for shower walls and others not at all. Check the manufacturer’s guide for the exact product before it goes near a shower.

Choose the Route by the Seams

I’d decide by counting joints. A wall of a few large panels has only a few cut edges, so a sheet aged before cutting gives little away. A wall of small panels or tiles is mostly edges, and that’s where aging after the cut earns its place.

Both products arrive under the same name, so ask which one the quote assumes, aged before cutting, or after.

How to Build a Glass Wine Room

A glass wine room is a refrigerated room for aging wine with at least one wall of glass, and it has to hold the conditions of a cave inside a warm house. Wine Spectator puts those conditions at about 55°F and around 70 percent humidity, and it ranks a steady temperature above everything else. Glass makes both numbers harder to hold. The room only works when the glass and the walls around it are designed together with the cooling, before anyone picks a rack.

Glass wine room set into a stone arch beside a dining table, with wine on its side and spirits standing upright.

Where Does the Vapor Barrier Go in a Wine Room?

A wine room is cold and damp inside a house that is warmer, so moisture is always pushing toward the cold side. The vapor barrier stops it, and it belongs on the warm side of the insulation, facing the house. A trade report in ACHR News described what happens when a contractor puts it on the inside instead, moisture moving through the wall soaked the fiberglass and pooled in the ceiling. The rule of thumb in that report is blunt. No vapor barrier is better than one on the inside wall.

Glass is where that envelope is weakest. The cellar builder Vintage Cellars notes that even insulated glass with two panes is a poor insulator, so a glass room usually needs a bigger cooling unit than its size suggests. One Toronto builder lists condensation on the glass among the results of building the showpiece without upsizing the cooling. It’s the same physics that fogs a window in winter, working in reverse.

Buying the Glass as a System

There are two ways to get the glass. A glazier can cut insulated units for a custom room, or the glass can come as part of an enclosure engineered for wine. The Wine Square, a European maker, sells a prefabricated glass enclosure, and its own manual treats the glass as the weakest point of the room. Its glass comes in a double pane version and a triple pane version, and the maker says the third layer adds another air gap.

The same manual gives two numbers worth handing to a structural engineer early, plan for the glass at 10 pounds per square foot and each bottle at 3 pounds. A thousand bottles is a ton and a half of wine on one floor. A custom room can perform as well, but I’d ask the glazier for the glass’s insulating value in writing and give it to whoever sizes the cooling.

Where the Cooling Goes

The cooling decides more about how the room looks than most clients expect. In that enclosure, only a slim radiator mounted in the ceiling shows inside the room, according to the brand’s North American dealer, connected by insulated tubing and network cable to equipment that can sit up to 100 feet away. Ducted systems from other makers do something similar with a grille. Either way, the equipment needs a place to live and a way to get rid of its heat, and that place goes on the plan before the framing.

Two cooling makers, Wine Guardian and CellarPro, say the same thing about humidity, the unit doesn’t create it. Wine Guardian says a dry climate needs a humidifier, and the vapor barrier keeps outside moisture from overwhelming the room. Vigilant, another cellar maker, warns that a household air conditioner can’t reach 55°F and pulls humidity out of the room. I’d run the room’s temperature and humidity alerts into the alarm system the house already has, and if the house has backup power, the wine room belongs on the list the family ranks.

Inside a glass wine room with oak racks and a slim cooling grille set into the plaster ceiling.

Can You Store Whiskey in a Wine Room?

Yes, but not the way wine is stored. Corked wine lies on its side so the cork stays moist, while high proof spirits can break down a cork, so Club Oenologique recommends standing those bottles upright. The same piece suggests one shared humidity band of about 60 to 70 percent when wine and spirits live together. Wine under a screwcap can go either way, since a screwcap doesn’t need to stay wet, according to Wine Spectator.

That means one wall may need two kinds of racking, cradles for bottles on their sides and shelves tall enough for bottles standing up. I’d have the rack maker count the actual collection by closure before drawing anything. For a cellar in the thousands of bottles, RFID tags let someone count the whole room with one handheld sweep, according to the merchant Westgarth Wines. If you build racking that holds both well, I’d like to see it.

The Champagne Lives Somewhere Else

White and sparkling wine have taken a much larger share of fine wine trading since 2010, according to Liv-ex figures reported by Cellar Advisor. Those bottles are served far colder than any wine is aged. Dometic puts Champagne at 41 to 45°F (5 to 7°C), while the cellar maker Avintage puts storage near 54 to 57°F (12 to 14°C). Chilling part of the aging room to close that gap costs the room its humidity: the Le Cache cabinet line, sold by Vintage Cellars, warns that its dual zone kit drops humidity to around 40 percent and should be used for serving, not storage.

So the glass room does one job, holding steady for years, and a cold serving cabinet near the table does the other. Drawn that way from the start, the glass and the cooling only have to answer to the long hold. The rack only has to fit what’s actually in the collection.

Belgian Flax Isn’t Belgian Linen

Belgian Linen™ is a registered trademark. The Belgian Flax & Linen Association grants it only to cloth woven at a mill in Belgium with at least 85 percent of its weight in flax grown in the EU. “Belgian flax linen” is a phrase, not a label, and the retailers who explain it say it usually means European flax that was spun and woven in China or India. The hangtag names the field and says nothing about the loom. The association makes the same point on its own site, where it warns that fabric carrying the Belgian Linen name or logo is not genuine when the essential processing happened somewhere else.

A contemporary dining room with walls covered in tightly stretched pale linen panels, a dark oak table, and floor to ceiling glass.

What Is the Difference Between Belgian Linen and Belgian Flax Linen?

The difference is the loom, and the rule says less about the flax than most people assume. The trademark asks for flax grown in the EU, not flax grown in Belgium, so a bolt woven in Flanders from fiber grown in Normandy qualifies. Several retailer guides that rank for this question describe Belgian Linen as made entirely in Belgium, from field to fabric. The association’s published rule says nothing of the kind.

What the rule does provide is a paper trail. Only member mills can apply, and they must disclose where their fabric came from. Each certified batch then receives a unique ID, which the association says lets buyers trace the cloth to its origin. A workroom or brand that wants to print the label on its own drapery or upholstery applies for a use permit through the mill that wove the cloth.

A European Flax Tag Only Covers the Fiber

Masters of LINEN™ belongs to the Alliance for European Flax Linen & Hemp, the body founded in 1951 as CELC. The certification is open only to European mills that turn flax into yarn or cloth. The Alliance describes it as a guarantee that every growing and processing step was done by a European company. The Belgian association states that all Belgian Linen™ also carries Masters of LINEN™ certification, so the two labels often travel together.

The Alliance’s other label is the one that gets misread. Masters of FLAX FIBRE™, known for years as European Flax™ before the Alliance renamed it, certifies that the fiber grew in Western Europe and tracks it through each company that handles it afterward. In 2026 the Alliance’s directory listed Qilu Hongye Textile Group in Shandong, China, certified since 2025 for flax spinning, along with other Chinese holders certified to produce linen fabric. A European flax tag can be completely accurate on cloth spun and woven in China.

Where Normandy’s Flax Goes

The Alliance’s certification documents put Europe’s share of the world’s long flax fiber at three quarters. How much of it stays in Europe is another matter. In 2025 Il Sole 24 Ore interviewed Thierry Goujon, general manager of Terre de Lin, the Normandy cooperative the paper called Europe’s largest flax producer. He said Chinese and Indian textile companies bought 90 percent of the cooperative’s flax. Terre de Lin kept the rest for the European spinning and weaving mills that remain, to keep them from going extinct.

Spinning has started to come back in small steps. Safilin, a French spinner founded in 1778, moved its spinning to Poland in the 1990s. It later opened a mill in Béthune, in the region where the company began. Il Sole reported that most of its production remained in Poland.

Pulled flax stalks lying in long rows across a field, turning gray as they ret.

The Golden River Story Runs Backward

In the nineteenth century, Kortrijk, on the Lys (the Leie in Dutch), was one of Europe’s most important linen towns. Its flax was retted by sinking bundles of stalks in the river until the fiber loosened from the woody core, and the Lys became known as the Golden River. The usual story credits something special in the water. Writing in The Low Countries in 2024, art critic Virginie Platteau put it the other way around, the retting probably turned the river yellow, and the river did nothing special for the retting.

The old claims about the water disagree with each other too. A Keystone stereograph caption from the early twentieth century, held in Cornell’s archives, says the Lys suited retting because it was free of minerals that might stain the fiber. Visit Gent describes the same water as rich in lime. I trust that disagreement more than the legend.

Put the Label Itself in the Spec

Each label answers a different question, so the decision belongs at the sampling stage, before anyone falls for a swatch. If the client is paying for Belgian weaving, the spec names Belgian Linen™, and the supplier provides the batch ID before the order is placed. If the point is European work from the field to the finished cloth, Masters of LINEN™ is the label that covers it. A Masters of FLAX FIBRE™ tag on its own is a fiber certificate, and a spec that stops there leaves the weaving open.

The mills behind these labels had to disclose or document their flax to earn them, and they are the makers I’d rather point a designer toward. Both the Belgian Flax & Linen Association and the Alliance publish lists of their certified members, which makes either one a sensible first call.

Water or Oil Gilding, Often Both

Water gilding and oil gilding are the two main traditional methods of laying gold leaf onto a surface. What separates them is what holds the gold down, a clay ground rewetted with water, or a drying oil adhesive called size. Water gilding can be polished to a mirror and oil gilding cannot. That is why the finest gilded pieces often carry both, and which one belongs where depends on whether a surface needs to shine and whether it will ever get wet.

Gold leaf on a carved side altar and ceiling inside Santo Domingo de Guzmán church in Oaxaca, Mexico.

What’s the Difference Between Water and Oil Gilding?

Water gilding starts with gesso, a mix of chalk and animal glue, and then bole, a fine colored clay bound with a little glue. SeppLeaf, a gilding supplier in New York, puts the gesso at six to eight coats on some surfaces. Just before the leaf goes down, the gilder wets the bole so the glue softens enough to grip the gold. Once it dries, the gold can be rubbed with an agate burnisher until it gives back a sharp reflection.

Oil gilding skips the clay. The gilder brushes oil size onto a sealed surface and lays the leaf once the size reaches the right tack. Frame maker Barrie Bryant, writing in Fine Woodworking, says oil gilding can’t be burnished that way and dries to a bright matte sheen. The Royal Collection Trust credits oil size with one real advantage in return, it holds gold in deep recesses that water gilding struggles to reach.

Gold I Couldn’t Read in Oaxaca

I’ve stood inside Santo Domingo de Guzmán in Oaxaca. The entire main altar at the back was gold, and the smaller altars in the side chapels had gold altars behind them too. The ceilings were gilded as well, above grand arches that ran the length of the main hall. I couldn’t have told you what that gold was laid on or how it was held there.

Lonely Planet describes nearly every surface inside as raised gilt relief around painted figures. In the Rosary Chapel, added in the 18th century, the gold on the dome covers modeled plaster, according to Florida Atlantic University’s archive of the photographer Florence Arquin’s slides. Standing under it, I had no way of knowing which method a gilder used where, and a designer holding a finished sample is in the same position.

Bright Where the Light Lands

Fine water gilt frames and furniture are often built around contrast, with raised carving burnished bright against matte grounds. When conservators at the Museum of Fine Arts, Boston studied the frame on Benjamin West’s Devout Men Taking the Body of Saint Stephen, they found four areas of water gilding on the original surface and oil gilding everywhere else. They noted that water gilding takes more time and skill, so it tends to cost more. A maker who saves it for the places light will catch is spending the client’s money well.

The clay color matters as well. The Society of Heraldic Arts notes that yellow bole usually won’t take a burnish, so gilders lay red bole on the parts meant to shine. The same account says the wide, thin brush that lifts each leaf has to be charged with static first. Gilders do it by sweeping the brush across their arm or the nape of their neck, and I like knowing that all that shine starts with someone’s hair.

Why Water Gilding Stays Indoors

The water that makes the method work also limits it. Wrights of Lymm, a British gold leaf supplier, points out that gesso and animal glue grounds stay sensitive to moisture for as long as they exist. SeppLeaf’s overview is blunt about it, water gilding is for interiors only, and only with genuine gold or silver leaf.

John Canning Studios, which gilds church domes and historic interiors, calls oil size the most durable and water resistant choice. Canning Liturgical Arts recommends nothing below 23.75 karat leaf for exterior projects, in a heavier weight of roughly 18 to 23 grams per thousand leaves. Its guide puts interior architectural gilding at typically 22 karat.

Imitation Leaf Is Brass

Leaf sold as Dutch metal or composition leaf has no gold in it. Britannica describes Dutch metal as brass of 85 to 88 percent copper, with zinc making up the rest. Like any bare brass, it tarnishes. Wrights of Lymm says it has to be sealed and isn’t made for unprotected exterior work, and Bryant writes that sealed imitation leaf still darkens over time toward a browner brass.

Wrights of Lymm also lists what imitation leaf does well, it costs a fraction of genuine gold and comes in larger, thicker sheets. Canning Liturgical Arts notes that the gilding at Radio City Music Hall used both kinds, and I have no quarrel with that. I just want the drawings to say which surface got which.

Carved antique giltwood frame with bright polished high points and matte recesses.

A Burnished Look Without the Clay

Some products promise burnished gold without traditional gesso and bole. In 1985 Kolner, a German maker, introduced a single layer burnishing clay that SeppLeaf says takes the place of the gesso and bole. Kolner’s Instacoll size goes further and skips the clay entirely. Wrights of Lymm calls it useful for interior decorative work and able to come close to a burnish with far less preparation, but says plainly that it doesn’t build the ground traditional water gilding depends on.

So “water gilded” on a quote can mean more than one thing. Ask the gilder to state in writing whether the job uses traditional gesso and bole or a modern substitute. Both can look good the day they’re finished, and only one is the method the term has meant for centuries.

Which Gold, Laid How

The specification should say, surface by surface, which areas are water gilded and burnished and which are oil gilded and matte. It should name the karat and confirm the leaf is genuine gold. Anything outdoors also needs a leaf weight on the drawings.

ETV Bharat reported that designers were choosing genuine leaf over metallic paint, often beside lime plaster and natural stone. A frame conservator knows water gilding from the inside, and an architectural gilding studio knows domes and weather, so the drawings decide which one to call. I still couldn’t tell you how the gold in Santo Domingo was laid, and on a new commission nobody should have to guess.

Most Boiserie Is Really Molding

Boiserie is French for woodwork. In an eighteenth century Paris room it meant a wall built as joinery, with solid oak frames holding panels that were set loose inside them. Most of what gets sold as boiserie now is something else. It is strips of molding nailed over drywall or MDF and painted so the wall reads as framed. Both have a place on a project. The difference shows up in the price, and in whether the wall can ever come down and go up again in another house.

Penthouse dining room with floor to ceiling oiled oak frame and panel walls.

What Boiserie Is Made Of

A real paneled wall is frame and panel construction at room scale. Vertical stiles and horizontal rails are joined into a rigid frame, and each panel sits in a groove cut into that frame without glue. The panel is left to float, so it can swell and shrink in its groove while the frame holds its shape, as long as the house keeps its humidity steady. Paneling built that way in the 1700s still lines rooms in museums.

Most of the Paris rooms at the Met are oak. Its room from the Hôtel de Varengeville, made around 1736 to 1752, is catalogued as painted and gilded oak. Some of the finest relief was cut in a softer wood and fixed to the oak. The Salon Doré at San Francisco’s Legion of Honor pairs white oak paneling with high relief carving in linden. Painted walls follow their own rule today, the Woodwork Institute’s guide specification calls for a closed grain hardwood when paneling will be painted.

Molding on Drywall Is a Different Product

The applied version starts with a flat sheet, often MDF, fixed to the wall, with molding strips nailed over it to draw the frames. There is no panel, only painted wall surface between strips. The ornament can be high density polyurethane, a rigid plastic poured into a mold, sometimes taken from a master carved by hand. It doesn’t move with humidity the way wood does, and in a damp room that is a real argument for it.

Makers have built a middle tier. Lualdi’s Avenue paneling, designed by Robert A. M. Stern, was made to order as shaped panels in matte lacquer. David/Nicolas launched La Boiserie at Milan Design Week 2026 as part bespoke craft and part reproducible system. Systems like these can be beautiful. The specification still needs to say what sits under the lacquer.

Carved Wood and Cast Ornament

Cast work turns up even in museum rooms. The Salon Doré’s four cornices carry cast plaster ornament alongside its carved linden. Féau Boiseries is the Paris house founded in 1875 that sold antique paneling to Gilded Age American families. Under Guillaume Féau, who took over in the early 1990s, it added a line of reproductions that use resin for precise details.

I don’t think cast work cheapens a room when it sits up at the cornice, out of reach. What I want is a shop drawing that labels which elements are carved wood and which are cast, so nobody finds out with a sander.

Antique Rooms Arrive With Later Additions

French dealers have been sending antique boiserie across the Atlantic since the Gilded Age, when Richard Morris Hunt installed an antique gold paneled ballroom supplied by Allard at Marble House. Museum labels show how often those rooms changed along the way. The Met’s label for the Varengeville room ends with “with later additions.” Its Neoclassical room from the Hôtel Lauzun, made around 1770, carries one modern panel and has no known eighteenth century provenance; by 1874 it lined a collector’s library on the Île Saint-Louis, stripped to bare oak and stained a dark brown.

Dealers still sell rooms in panels, shipped to be adapted to the buyer’s space. Where a room has been is part of what the client is paying for, so the dealer should put in writing how much of it is original and what was added later. Féau dates pieces in a lab by their paint colors, so paint analysis is a fair thing to request.

Close view of carved antique wall paneling

Water Gilding or Oil Gilding

Both methods turn up on gilded paneling. Water gilding lays gold leaf over gesso and a clay layer called bole, and the bole lets the gold be burnished with an agate stone to a mirror finish beside matte areas. The Salon Doré is water gilded. Oil gilding can’t be burnished, and the Royal Collection Trust notes that most architectural gilding has been oil gilded.

When missing carvings in the Salon Doré were recut, they were water gilded to match the old work. The project summary published by the American Institute for Conservation noted that oil would have been faster. On a new wall, that tradeoff is the first thing to settle with the gilder, and it lands in the client’s budget.

Start With One Corner

Real paneling has its own place in the specification. In MasterSpec it is Section 06 42 14, Stile and Rail Wood Paneling, built to a grade in the Architectural Woodwork Standards, where Premium is the highest of three. The Woodwork Institute’s guide specification asks for a mockup of one section with an inside and an outside corner. Whoever builds it, an architectural woodworking firm for new work or an antique dealer adapting a room, should name the carver and the gilder on the job. Then study that corner. It shows whether a panel sits inside a frame or a strip of molding sits on a wall, and that difference is what the word boiserie now hides.

How Much Humidity a House Can Hold

A whole house humidity system adds moisture to the air while the heat runs and pulls it out while the cooling runs, and in a house full of wood and paintings it has to hold a number someone actually chose. The flooring warranty and the piano maker each publish their own figure, and in a cold climate the windows set a ceiling below some of them. The right target is the highest humidity the glass can carry without condensation, checked against the most sensitive object in the house, and both get settled before anyone picks the equipment.

A music room in a stone farmhouse with a grand piano and clear windows looking onto snow.

The Numbers Don’t Agree

Wood flooring warranties are the most specific documents in the house on this. One engineered flooring warranty I found required the room to stay between 35 and 55 percent relative humidity year round, and a solid wood maker’s ran 35 to 60. Both excluded damage from humidity outside their range, so a floor that gaps after a dry winter may not be covered. The range for a specific floor sits in its own warranty, and the installer should confirm it in writing before installation.

Art asks for more. Chubb, which insures fine art collections, has advised display conditions around 45 percent at roughly 21°C. Steinway’s UK care guide gives a wider band, 45 to 70 percent at about 20°C. Solid wood furniture has its own tolerance, and a long heating season is when a finish starts to split where the joints meet.

Side by side, the floor’s upper limit of 55 sits just above the 45 that art and a piano both want at minimum. There is room to work.

What Indoor Humidity Is Best for Breathing?

Climate decides which way the system works hardest. A desert house in Scottsdale or a ski house in the Rockies spends much of the year adding moisture, and a house in Miami or Singapore spends it taking moisture out. Both directions matter to the people living there. The Mayo Clinic links dry indoor air to dry sinuses and nosebleeds and puts the ideal home range at 30 to 50 percent. On the humid side, the CDC’s asthma guidance recommends keeping indoor humidity around 30 to 50 percent to limit dust mites and mold.

Set beside the floors and the art, the health numbers mostly agree. A house held near 45 to 50 percent sits inside the health guidance and the collection guidance at once, which makes the number easier to defend to a client. The trouble starts outside.

How Humid Can a House Be in Winter?

Indoor moisture condenses first on the coldest surface in a room, and in winter that is the glass. Cardinal Glass, which makes insulating glass for window manufacturers, puts a comfortable average at 35 to 40 percent when it is 20°F or warmer outside, and points to ENERGY STAR’s advice of 30 to 40 percent in colder climates. A window company’s guide drops the ceiling to 30 percent once it falls to 0 to 10°F. Minnesota’s Center for Energy and Environment warns that in extreme cold, even 40 percent can condense on windows and wall surfaces.

That puts the art’s 45 percent out of reach on a January night in a snowy climate with ordinary windows. The same window guide notes that window type and air sealing both change how much humidity a house can hold before the glass fogs, since a warmer inner pane lets the room carry more moisture. The humidity a collector wants is partly a window specification. I’d put the question to the window supplier in writing, what indoor humidity will this glass hold without condensing on the coldest nights this house will see? A controller with an outdoor sensor can also lower the target as the weather turns colder and bring it back up on milder days.

The Water Decides Which Steam

Steam is the type built for tight control, and it has a second argument in its favor. The Mayo Clinic’s main warning about humidifiers is mist from a dirty unit carrying bacteria or mold into the room, and steam starts as boiling water, which is why makers such as Condair describe it as sterile.

It comes in two kinds. An electrode unit boils water by running current through it, so it depends on the minerals in the water to conduct. Humidifier maker steamOvap states that an electrode unit can’t run on reverse osmosis or deionized water for exactly that reason. A resistive unit heats the water with submerged elements, so mineral content doesn’t change its output. Condair says a resistive unit on reverse osmosis water can hold humidity within 1 point either way. It also lays out the tradeoff plainly, electrode units cost the least to buy, and resistive units cost the least over their working life once replacement cylinders and service are counted.

So the humidifier follows the water. Each manufacturer’s installation guide lists the water types a model accepts, and that list is worth checking against the house’s water treatment before anything is ordered. A house that already runs its water through reverse osmosis points toward resistive, and the steadier control is the reason a collector would pay for it regardless.

Where the Steam Comes Out

In a house with forced air, steam enters the supply duct through a dispersion tube and travels with the air. A house heated through radiant floors may have no ducts to carry it, so the steam has to enter the room directly. AprilAire sells a ductless version that pairs a steam unit mounted out of sight with a fan pack recessed into the wall. The room sees a grille rather than a cabinet. That grille is the one part of the system anyone will see. It deserves the attention of a switch plate, and it’s worth asking the manufacturer whether a custom grille in the room’s own metal finish will still let the fan pack do its job.

A penthouse hallway with a framed work and a slim grille set flush in the plaster wall.

Summer Is the Opposite Problem

An air conditioner dries the air as a side effect of cooling it, and only while it runs. Lennox notes that an oversized system can cool a room quickly and still leave the humidity behind. It reaches the thermostat setting and shuts off before it has pulled enough moisture out. Tight houses make this harder. Field Controls, which makes whole house dehumidifiers, points out that a tighter house holds on to its moisture, and that the air conditioning alone often can’t bring it down to target.

A whole house dehumidifier works independently of the cooling, and Lennox describes pairing one with a variable capacity air conditioner as one of the most efficient setups available. Before either goes on the drawings, the document to request is a written Manual J load calculation from the mechanical contractor, the sizing method published by ACCA, because the size of the air conditioner decides how much drying it does on its own.

The Most Fragile Thing Sets the Number

When the glass can’t carry the art’s number, the answer is usually smaller than the house. Steinway’s UK guide makes the same call for a single instrument, humidify the room around the piano rather than fit a unit inside it. Scaled up, that means a music room or gallery on its own zone, held at its number through January while the rest of the house drops to what the windows allow.

This is general information, not a mechanical design or medical advice. Equipment requirements and local codes vary, so confirm every figure with the manufacturer’s documentation and the project’s engineer, and take health questions to a physician.

Sourcing Tonalá Burnished Pottery

Tonalá burnished pottery, barro bruñido, is unglazed earthenware from Tonalá, Jalisco, rubbed with stone and then pyrite until the clay itself shines. It was a luxury in Europe long before it was a souvenir, and today the town sells two very different things under the same name, work from master workshops and market stock made to a price. What separates them is the maker, and a maker’s record can be checked.

Unglazed earthenware vessel from Tonalá, Jalisco, painted by hand.

A Water Jar for the Spanish Court

In the 1600s and 1700s, Tonalá water vessels called búcaros de Indias were among the most prized objects in elite European households. Collectors valued them for the aroma and taste the clay gave the water inside. The Denver Art Museum notes that some owners kept them in wooden boxes scented with spices and oils, so the absorbent clay would carry more fragrance. The clay was also thought to be medicinal, and fashionable women in Spain and Italy ate fragments of it, which the Metropolitan Museum of Art says left their complexions pale. In Velázquez’s Las Meninas, painted in 1656, the Infanta Margarita is offered a small búcaro of water on a silver tray. The V&A holds dimpled Tonalá vessels from that century and notes that potters in Tonalá still work in the búcaro tradition.

How Burnished Clay Is Made

The clay is dug from the hills around Tonalá, then ground, sifted, wetted and left covered for months to ferment, according to a profile of the Jimón family published by the Feria Maestros del Arte. Once a piece is shaped and dry, it is smoothed with stone. A slip seals the pores and lays down the background color, and the decoration is painted in clays mixed with earth pigments. The final shine most sources describe comes from a burnisher made of pyrite, a metallic mineral. Agustín Jimón Barba, whose family has worked clay for more than seven generations, finishes with tallow instead, by the fair’s account. The piece is then fired once in an open kiln.

Is Tonalá Pottery Glazed?

Burnished Tonalá ware has no glaze. The San Antonio Museum of Art’s label for a Tonalá vase from about 1930 says it plainly, the shine comes from rubbing the clay. Even dealers confuse the two. One vintage listing describes a duck’s “glossy glaze” and in the next lines presents it as typical of barro bruñido. A glaze is a layer of glass fused onto the surface. A burnished surface is the clay itself, polished. Because it stays slightly porous, most burnished work made today is decorative rather than functional, as Ceramics Monthly noted in its profile of two Tonalá potters. Before specifying a piece to hold water for flowers, ask the maker whether it will.

Reading the Ground Color

Burnished work in Tonalá runs in family lines, and the background color often points to one. A 2017 La Jornada column on an exhibition of Ángel Santos’s work named the grounds he had drawn on. Earthy orange went with Jorge Wilmot and Salvador Vázquez Carmona, and gray with the Galván and Jimón families. The Mateos Ortega family worked in black sgraffito. The gray line has carried on, Guadalajara’s Museo de Artes Populares gave the Jimón López family a show of burnished and bandera clay in 2026. Bandera and canelo are burnished too, each with its own look. Bandera paints white and green over a red ground, the colors of the flag, and canelo fires to shades of cinnamon. A seller should be able to tell you which clay a piece is.

Pyrite, stones and fine sand in clay bowls on a workshop table.

Tonalá Pottery Signatures and Prize Records

Vintage dealers often identify Tonalá pieces by a mark on the base, sometimes a family name, sometimes initials. A signature tells you whose work to ask about. On its own it proves little. The stronger record is the Premio Nacional de la Cerámica, Mexico’s national ceramics competition, seated in Tlaquepaque in the Guadalajara metropolitan area. Its traditional ceramics category names burnishing among the techniques it judges, and its top prize is presented by the president of Mexico. Vázquez Carmona won the presidential award in 1999, and Santos won it in 2014. Ask whether a maker has placed there, and in what year. That question separates a workshop from a stall better than anything you can see on a shelf.

Fewer Hands Burnish It Now

The craft Spanish collectors once paid for has been shrinking. In 2016, Tonalá potters speaking at the University of Guadalajara said the number of burnished clay artisans in the town center had fallen to about 100, from hundreds in the 1970s, and that new housing was covering the clay deposits. In 2024, a Santa Fe museum shop described the technique as made by only a few artisans in Tonalá. The vice president of retail for the foundation behind that shop has said vintage Tonalá turns up in the US, while new work rarely does. Two routes lead to it. The juried Feria Maestros del Arte near Lake Chapala, where Tonalá potters including members of the Jimón family have exhibited, has offered packing and international shipping on site. The other route is the workshops themselves in Tonalá, found through the prize records above. If you make burnished work in Tonalá and want designers to find you, I’d like to hear from you.

Soft Quartzite Is Marble

Soft quartzite is a name stone yards give to marble, most often dolomitic marble, when it’s sold as the harder stone. The Natural Stone Institute’s quartzite bulletin rejects the term outright, there is only one kind of quartzite, hard and resistant to etching. A slab yard can carry three different rocks under the word quartzite, and only one of them is quartzite. That matters because a client rarely picks quartzite for its looks alone. They pick it to get marble’s veining without marble’s reaction to a squeeze of lime. If the slab turns out to be marble, the client paid for a promise the stone never made.

Stone yard warehouse.

Why the Name Slipped

Geologist Karin Kirk, who wrote that bulletin, named Super White and Fantasy Brown in a 2018 Building Stone Magazine article as marbles that had been widely sold as quartzite. Many dealers had started relabeling them. The trade’s habit of giving stones its own house names still made any single stone hard to track.

The confusion runs in both directions. At a 2022 stone industry session, Buddy Ontra, then president of the Natural Stone Institute, recalled being told the first Taj Mahal he cut, around 2009, was granite. Taj Mahal is real quartzite. The same discussion turned up Shadow Storm and Carrara Quartzite, sold under the quartzite name in one participant’s area, as Brazilian marbles.

The two rocks come by their resemblance honestly. Quartzite begins as sandstone, buried and heated until the sand grains recrystallize into one solid mass of quartz. Marble forms the same way from limestone or dolostone, so it stays calcite or dolomite. Even a trained eye can’t sort them, in Kirk’s view.

How Do You Tell Quartzite From Marble?

Hardness answers it. Quartz sits around 7 on the Mohs scale and glass around 5.5. The Kansas Geological Survey puts calcite at 3 and dolomite at 3.5 to 4. So quartzite scratches glass and marble cannot.

The method Kirk teaches starts with a glass tile laid flat on a table, never held in your palm. Take a sharp raw edge of the stone with no epoxy on it and press with your weight behind it. Real quartzite bites, loud enough to hear, and the scratch won’t rub off. Marble glides across, or leaves a line that rubs away. Try a second spot, since some marbles hold small pockets of quartz that can fool one pass.

With no offcut available, a knife tip on the slab edge does the same job, with the yard’s permission. Marble takes an obvious scratch. Quartzite takes nothing a fingernail can catch.

Dolomite Needs a Second Drop

The acid test confirms what the glass found. The standard is a single drop of 10 percent hydrochloric acid on unsealed stone. Calcite marble fizzes, which is the stone dissolving. Quartzite does nothing at all.

Dolomitic marble can sit there looking innocent. Scrape a little powder loose with the knife tip and put the drop on the powder instead, and dolomite gives itself away with small bubbles. Quartzite barely gives up any powder to test. Lemon juice or vinegar works as a slow version. Leave it at least 15 minutes, then look for a dull patch, or one that reads lighter or darker than the stone around it.

None of this makes dolomite a bad stone. It etches more slowly than calcite marble, which gives a client a short window to catch a spill. It just isn’t quartzite, and it shouldn’t be priced or promised as one.

Sandstone Is the Smaller Mistake

Sandstone sold as quartzite is a milder error, because both are mostly quartz and behave much alike. Porosity is the real difference, and porosity decides staining. Metamorphism comes in grades, so quartzites run along a continuum. Kirk put White Macaubas close to sandstone in porosity and Taj Mahal at the dense end, and some quartzites absorb more than some sandstones. ASTM C616, the specification for quartz based dimension stone, draws its lines by free silica content, with sandstone, quartzitic sandstone, and quartzite as Classes I, II and III.

A stone that passes the glass test can still drink red wine. A few drops of water on an unsealed sample show how fast it absorbs. Sealing is its own subject, covered in A Stone Sealer Stops Stains, Not Etching.

Wet bar in a paneled library with a white veined stone counter and backsplash.

The Shop Cutting It Reads the Label Too

The label matters past the client’s counter. A California workplace safety evaluation in April 2026 listed natural quartzite at more than 90 percent crystalline silica, against 10 to 45 percent for granite and under 5 percent for marble. Engineered quartz, the material behind California’s countertop silicosis cases, typically runs above 90 percent too, according to state public health researchers. A slab drifting between the words marble and quartzite tells a fabrication shop the wrong thing about the dust it is about to make.

Three Years Is the Shelf Life of a Test

A yard name and a price tag settle nothing about what a slab is. Reliable stone companies keep physical property test data on their stones, and ASTM’s guide on stone test sampling recommended that the data come from the previous three years. Kirk added that a shift in the quarry face calls for fresh testing. The two people worth working with are an importer who can hand over current lab data, and a fabricator willing to run the glass and acid tests on an offcut before anyone templates the slab. I’d ask to see the date on that data sheet before I’d ask the stone’s name.

Not All Shou Sugi Ban Is Yakisugi

Yakisugi is Japanese cedar charred on purpose, and shou sugi ban started as a misreading of its name. The old way to make it needs three boards and a ball of paper. The boards are tied into a triangular chimney with the paper lit at the bottom. The draft pulls fire up the inside faces until they turn to charcoal, and then the chimney is tipped over to stop the burn. Takeshi Hayatsu, an architect from Okayama, has described it as an inexpensive way to clad the backs and sides of buildings, and named his home region as the place it’s used most. In North America it became a premium facade.

Charred wood cladding.

Shou Sugi Ban Is a Misreading

The word is 焼杉: yaki, burned, and sugi, the Japanese name for Cryptomeria japonica, the conifer the West calls Japanese cedar. The Western name came from reading the longer form, yakisugi ita, with Chinese pronunciations mixed in. Ban is the Chinese reading of the character for board. Nakamoto Forestry, a Japanese producer that spent years correcting the term, eventually started using both names on its own site, because the wrong one drew nearly ten times the audience.

Use whichever word gets the conversation started. The trouble is what the label lets through. ArchEyes traced how “shou sugi ban” became a catch all for any charred wood, whatever the species. It also pointed out that a spec using the term can come back as authentic sugi or a Western cedar board torched by machine, with paperwork that looks the same.

Name the Species on the Drawings

Even the purists draw the line in different places. Popular Woodworking holds that only charred sugi can be called yakisugi. McIlvain, a lumber distributor, counts Japanese cypress as well, and notes that some sellers burn other species and label them shou sugi ban anyway. According to Architizer, Delta Millworks, a charred wood maker, once steered the architects of a house away from its own charred Southern cypress toward charred Accoya, an acetylated radiata pine from New Zealand, for its finish and durability.

None of these is a fake. Each is a different board with different behavior. If a client wants the Japanese material, I’d write Cryptomeria japonica on the spec and let the trade name follow.

How Deep the Char Goes

Speed is where the char gets thin. In a 2022 study published in BioResources, researchers replaced the paper ball with a gas burner to improve the industrial process. The char came out thinner than the traditional method produced, and they put that down to a shorter burn. ArchEyes, in a feature built around a Japanese producer, gave traditional three board sugi a carbon layer of 3 to 10 millimeters depending on finish, against 1 to 2 millimeters for boards passed through a flame on a conveyor. Ask the supplier how the boards were burned and how deep the char runs.

Fire also cups the board. Terunobu Fujimori, the architect and historian whose trademark materials include yakisugi, used cedar charred in eight meter lengths on Yakisugi House in Nagano. The boards warped, and he filled the gaps with plaster. The black and white stripes on that facade started as a fix.

Brushed Once, Brushed Twice

Unbrushed char keeps its full scaly surface, and Nakamoto’s own spec sheet called its unbrushed, unoiled board very delicate and said it would blemish. One pass of the wire brush takes off loose soot and leaves a subtler texture. As the Woodworkers Institute describes it, a second pass strips the soft spring growth bare and leaves the harder late growth as dark ridges. Oil changes the surface again, Nakamoto described tung oil turning unbrushed char leathery and slowing how fast the soot wears away.

Inside a house, bare char rubs off on hands and clothes, so interior boards get sealed. Nakamoto sold a tung oil prefinish for exterior use only and a polyurethane prefinish for interior use. Its finish names, Suyaki and Gendai, carry its registered trademark, and another maker’s board won’t use either one. Write the finish out instead, by the number of brushing passes and whether the board is oiled.

Close view of charred wood.

Is Shou Sugi Ban Fire Resistant?

The char helps. McIlvain explains that the surface layer has already given off the gases that feed ignition. A rating still belongs to one product in one finish. When I checked, Nakamoto’s fire table listed its unbrushed line as Class A, B, or C under ASTM E84, depending on finish. McIlvain, which carries charred modified woods, reported Class A for charred thermally modified ash and for charred Accoya, against Class C for uncharred cedar. Nakamoto also noted that in high fire zones, compliance usually comes from a tested wall assembly, not from the siding alone.

For a project in a wildfire zone, ask for the test report on the exact finish being specified, plus the assembly listing that covers the wall.

Four Lines on the Spec Sheet

A yakisugi spec that works names four things. The species, by its botanical name. The burn, with its method and depth. The finish, by brushing passes and oil, sealed if it’s going indoors. And the fire report for that exact finish, with the assembly listing if the site needs one. For the Japanese material, a producer with a North American warehouse is the direct route. For another species, a domestic shop that burns its own boards can answer all four lines just as well, and the drawings should say which board was chosen.

Leather on Walls and Furniture

A leather wall today is usually built from tiles or panels of real hide, flat or padded, glued or clipped to the wall. Spinneybeck, a leather house just outside Buffalo, New York, makes its wall tiles from full grain, vegetable tanned belting leather about three millimeters thick. The same hides go onto furniture, wrapped around a wood or steel frame and stitched by hand.

Flat ink blue leather wall panels in a dressing room, afternoon light falling across the seams.

Older Than Printed Wallpaper

Spain had leather walls long before printed wallpaper. The craft came from North Africa, and its Spanish name, guadamecí, points back to the Libyan town of Ghadames. Córdoba made it under Moorish rule, and by 1569 Venice had given its leatherworkers guild status inside the painters’ guild. The panels were embossed and silvered, sometimes painted. The antiques trade notes that the gold on old Spanish leather was usually silver leaf under a yellow varnish, since gold leaf was never laid on leather. Printed wallpaper arrived from around 1650 and undercut it on price, and leather walls held on mostly in very grand houses. In 2020, Arab News described José Carlos Villarejo García as the last artist working Córdoba’s Umayyad guadamecí technique, in a museum he founded there in 2006.

Some makers lay leather on floors too. Alma in London has made leather floor tiles, and Cuir au Carré has paired calf leather walls with buffalo leather floors. Freund, a leather surface maker, has marketed leather floors and ceilings to designer hotels.

Are Leather Wall Panels Fire Rated?

In commercial interiors, wall panels are tested under ASTM E84, the standard that measures how fast flame spreads across a surface. Class A is the top result. The rating can change from one leather to the next, even inside one supplier’s range. Garrett Leather, a US supplier, published Class A ratings for some of its leather lines and Class B for others, and asked designers to name the rating when they ordered. Where a rating matters, ask for the test report tied to the exact leather and color going on the wall.

Sunlight Changes a Leather Wall

A wall sits in the light all day, which a chair rarely does. Fritz Hansen’s care guide notes that dyed aniline leather fades in sunlight while natural, undyed aniline darkens. The European guide for upholstery leather, EN 13336, recommends a lightfastness of at least 3 on the blue wool scale for aniline, 4 for semi aniline, and 5 for pigmented leather. Supplier spec sheets often list that number. For a sunny wall, I’d ask for it before I’d ask for the color name.

Furniture Wrapped by a Saddler

Furniture Wrapped by a Saddler

Wrapping furniture in leather is closer to tailoring than to upholstery. Soane Britain has its leather pieces made by a traditional saddler in Suffolk, who chooses the hides for each design and wraps the wood or metal frame himself. He stitches the seams by hand and burnishes the edges. The pairing of designer and craftsman goes back at least to Jean-Michel Frank, who worked with the cabinetmaker Adolphe Chanaux from 1929. Their desk from around 1930 has a leather top and drawers covered in leather on a lacquered steel frame. A wrapped piece needs both trades, someone who builds the frame and someone who knows hide.

Start With the Hide

For a wall, the path runs through a leather house with an architectural line, one that sells panels by the square foot and can send the fire report along with the sample. For a wrapped desk or bed, it runs through a cabinetmaker who works with a saddler, and the saddler should see the hide before anyone cuts it. Either way, ask where the hides come from. Cattle hide is a byproduct of beef and dairy, historically worth 6 to 8 percent of the animal’s value by the US leather trade council’s figures. A supplier who can name the tannery and the country of origin knows the material all the way back.