How to Install a Granite Tile Fireplace

Measure the dimensions of the outer framing of the fireplace. Transfer these measurements to cement board, and cut out the board, using a circular saw and masonry blade. The cement board will attach easily to the tile mortar. Place the cement board on the surface, and drill 3-inch screws through the board and into the wood. If you are covering a brick or other hard surface, it is better to mix up some thin-set mortar. Spread a thin layer of the mortar over the brick and let it dry for a day.

Measure the width of the fireplace and cut a small 2-inch-wide strip to this length with a circular saw.

Screw the wood strip to the top edge of the fireplace opening. Place it so the top of the strip is right at the fireplace opening. Use a level to make sure it is horizontal.

Mix up some thin-set mortar according to the package directions. Spread the mortar in a small section on the fireplace above the wood. Use a notched trowel to create an even surface of mortar.

Place a granite tile on the mortar, resting the bottom of the tile on the wood strip. Repeat this step until you have installed the first row on top of the wood strip. To form a solid-looking surface with the tiles, place them right next to each other. For a tiled look, leave a gap of ¼ to 1/8 inch, using tile spacers.

Start a second row. If you are creating a tile effect, you might consider staggering the second row so the seams are similar to how brick is laid. To do this, the first-row tiles need to start at a center line, with one tile on either side of the line. The second row then begins with a tile centered over the center line.

Repeat the process until the top of the fireplace is covered. Let it dry overnight, and then take off the wood strip.

Cut the granite to fit the edges. Measure the space, and then mark the tiles. Cut along the lines, using a wet saw with a diamond-tip blade.

Cover the sides of the fireplace. Start at the bottom and work your way up. Use spacers between the tiles if you are leaving gaps. Cut the tiles to fit around molding. Make the cuts as described in Step 8. Let the tiles dry for a day.

Cut tiles and add them to the side edges of the fireplace in the same way you added them to the front.

Mix up grout and spread it over the tiles with a rubber float. Force it into the gaps, and wipe off the surface of the tile as you go. If you put the granite tiles up against each other, they will still have a small gap along the surface that needs to be filled. Let the grout dry for a day.