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product line- unglazed thin brick walls

we scoured the country looking for a thin brick and discovered these foundry flats at a family-run business with a long history of working with clay.
sourced from materials located within 25 miles of the factory, the flats are solidly made with a body that reflects a color palette that is both modern and enduring.
made from clay and water, foundry flats are a classic american, affordable, and recyclable product offered in an array of earthy hues ranging from a sooty, volcanic black to a mineral-flecked shade of honey.


What grout joint size should I use?

We recommend a 3/8” grout joint with our foundry flats collection which allows for 6.54 tiles per square foot. Should your project require a smaller joint, keep in mind that additional tiles will need to be ordered as our checkout calculations are all based on 6.54 tiles per square foot.

Here are the pieces per square foot for a few other common grout joint sizes:

1/8” grout joint - 6.97 tiles per square foot

1/4” grout joint - 6.75 tiles per square foot

pieces per square foot comes to 7.2 when no grout joint is taken into account

for our corner pieces, we also recommend a 3/8” grout joint, which allows for 4.5 tiles per linear foot. Should your project require a smaller joint, keep in mind that additional tiles will need to be ordered as our checkout calculations are all based on 4.5 tiles per linear foot.

Here are the pieces per linear foot for a few other common grout joint sizes:

1/8” grout joint - 4.68 tiles per linear foot

1/4” grout joint - 4.57 tiles per linear foot

pieces per linear foot comes to 4.8 when no grout joint is taken into account

what grout type and color do you recommend?

clé recommends the use of mapei flexcolor cq tile grout with this collection.

Grout color selection is always up to our client and/or their design professional. However, clé is often asked for our opinion on best grout selections for our tiles. And due to the large array of grout colors that are now available, clé would like to offer this general guideline on a foolproof grout color selection for any of your clé tiles.

  • First, have your professional tile contractor complete your tile installation, except for the grout portion. 
  • Next, when ready to grout, ask your contractor to bring ALL grout color charts from his preferred grout manufacturers, for your review.
  • Lastly, choose a time of day when you are most pleased with the lighting in your space (either natural lighting, installed lighting or a blend of both). During that lighting and time of day, select the grout color that best matches your tile selection.

Note that the full Mapei Flexcolor CQ color catalogue contains 40 colors to choose from. Visit the Mapei website to view.

what are the key differences between standard issue and forge?

standard issue bricks are utilitarian and durable, well suited to almost any space - both interior and exterior. the standardized clay surface provides a uniform, clean modern look.

each piece of the forge line has been manufactured with an artisan approach. manipulated at different stages in production, the textural surfaces create a visceral experience and raku-industrial finish. 

american made, both standard issue and forge bricks emphasize classic, industrial style and are manufactured to last and improve with age.

Do foundry flats meet standard thin brick specifications?

foundry flats shall be selected by the architect/designer/owner from manufacturer’s standard sizes, shapes and glazes. foundry flats meets or exceeds ASTM-C1088 Type TBS or TBA

note: interior/exterior specification - sand cast, sinter, alloy flux and cast iron are not freeze thaw rated but are otherwise acceptable for exterior wall applications only. for wet applications, specific waterproofing precautions need to be taken such as using a waterproof membrane under the tile and a penetrating sealer like miracle 511 porous plus to seal the grouted areas and the tile surface foundry flats cannot be used in a pool.

how much color variation can I expect?

foundry flat colors vary both in texture and color from brick to brick, with some individual tiles more than others. These variations are intentional, resulting from particular production methods and raw material choices. When specifying foundry flats, if color consideration is paramount, always work from a sampling of 3 or more bricks, which represents the range of color you can expect on the job.

why do you suggest i order at least 15% more than my measurements?

Industry standard suggests adding at least 15% overage due to tile cuts, potential breakage, or future repairs.

For more information related to ordering and shipping, please be sure to visit our shipping and returns and delivery information resource pages


Rectangle - Forge - 2 1/2"x8"x3/4"*

Corner - Forge - 2 1/2"x8"x3 3/4"*

Rectangle - Standard Issue - 2 1/2"x8"x1/2"**

Corner - Standard Issue - 2 1/2"x8"x 3 1/2"**

*with the exception of sawdust which has a 5/8" thickness and factory which has a ½” thickness

**with the exception of ferrous which has a 3/4" thickness.

Disclaimer: Please note all dimensions are nominal and can vary plus or minus 1/4 inch. 


interior wall, exterior wall, shower wall, backsplash, kitchen, fireplace surround. Limit all exterior usage to locations not affected by freeze thaw. Not suitable for floors.


installation and maintenance guides