How to Install Marble Tile on a Fireplace

Remove the old tiles from the fireplace with a chisel. This is the hardest part of the job. Do your best not to pull sheetrock off the wall. Also be sure to peel off any mesh backing before moving on with installing the marble tile.

After removing the old tiles from the fireplace, make sure the surface is smooth. You may have to replace the sheetrock if the existing sheetrock has large holes or is bumpy. You can also install backerboard (optional) where the tile will be placed by screwing it into the wall. The backerboard provides a lightweight, smooth surface for the tile. Be sure to patch any holes with a joint compound before moving on with installing the marble tile.

Measure and find the center of the fireplace wall. Mark this with a chalk line both vertically and horizontally. Determine where the marble tile should sit and dry fit the tile to be sure you like the spacing.

Measure and cut the marble tile. You can rent a wet saw (for large tiles) and/or tile cutter (smaller tiles) from a local home improvement store.

Mix the bonding mortar according to the manufacturer's instructions. Be sure to mix it thoroughly, without lumps. Let the mixture sit for five minutes.

Using a square notched trowel, apply the mortar to the fireplace surface you want to tile with marble.

Place the first tile into the mortar on the center line where you have determined it should be. Continue placing tiles along your line including spacers for each tile to keep the spacing consistent. Be sure to move the marble tile slightly while placing it, then move it back into the set position. This helps make sure the tile is firmly placed in the mortar. Continue until you have all the tiles in place.

Let the mortar dry on the fireplace for at least 24 hours, undisturbed.

Mix the grout and let it sit for 10 minutes. Be sure to purchase the correct type of grout for the amount of space between each marble tile.

Remove the tile spacers. If there is extra mortar hanging out, carefully remove it.

Use a grout float applicator to apply the grout between the marble tiles on the fireplace. Wipe off the excess grout with a large tiling sponge, rinsing often.

Let the grout dry on the fireplace, undisturbed, according to the manufacturer's instructions. Wipe off any grout haze with a dry cloth. Seal the grout according to manufacturers directions.