Concrete and Mosaic Chess Board 2026

Concrete Chess Board and Mosaics, here is an easy way to cast a concrete chess board using square tiles.

The same techniques can also be used to shape small or even large tables.

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Materials and Supplies:

• 10 lbs. Concrete
• Rubber gloves, safety glasses, dust mask
• Galvanized sheet
• Ruler and marker
• Square Tiles
• Spray glue
• Foam walls
• Transparent packing tape

Tools:

• Variable speed concrete polisher and pads (optional)
• Diamond pads

Step 1: Mark it and casting surface

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For this project we use a galvanized steel sheet. You can also use a thin sheet of acrylic plastic or similar. You can also use a 1/2″ thick piece of melamine. 3/4″ sheet materials will work, but it is much easier to remove from concrete if adhered with something thin.

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There is a piece of plywood under the galvanized steel so it sits flat. It is glued around the edges to prevent it from sliding around.

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Tiles: The tiles used here are 1-7/8″ squares. This is a pretty good size for standard chess pieces. Ideally, the tiles are completely flat on one side.

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Mark the perimeter: This piece is 16-3/8″ square. This is the size that worked out with the 1-7/8″ tiles, plus a 1/2″ border.

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Step 2: Glue Tiles Down

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Stick the tiles in place with spray adhesive.

PRO TIP:

Spray one side of the tile, press it down into place, lift it up, spray more adhesive, wait a bit, then press it again. This is an easy way to get adhesive on both surfaces without having to spray the casting surface, which will be cleaned later.

Step 3: Add the borders

Glue the form walls in place. Here we are using 1″ styrofoam strips and double-sided carpet tape.

Place clear packing tape on the inside surface. This will give the concrete a smooth finish and make foam removal easier.

Seal large gaps with silicone caulk.

Step 4: Decorative addition and details

We sprinkle decorative aggregates (moonstone) into the form. This will show on the surface when the piece is polished.

You can also glue other decorative details to the walls in the form such as rubber stamps or decorative minerals, or in this case a fossilized ammonite.

Step 5: Empty

Mix to a casting mix consistency and fill the shape completely.

Vibrate the shape by moving it from side to side and lifting one edge and dropping it on the table. Concrete does not need much vibration to obtain a very tight surface, but decorative aggregate can trap a lot of air.

Cover the piece with plastic and let it dry.

Step 6: Dry and Unmold

Let the piece dry for 2-3 days.

Remove the foam walls.

Turn the piece over and peel off the galvanized sheet.

Wipe off extra spray adhesive.

Step 7: Polish and Seal

The piece is now polished with a variable speed concrete polisher to expose the decorative aggregate. Like sandpaper, you can get a high polish through various grits/pads.

It is then sealed, which will give it a natural satin finish and help it look good.

Step 8: Checkmate! The finished chess board

A few small pieces of felt or cork on the underside of the board will prevent scratches on the table. Greetings.

Get more information at Perfectidea.com and on our Facebook for more Concrete Chess Board and Mosaics.

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