This story shows you the steps for tiling a fireplace.
For a modest cost, tile will alter the look of a fireplace and dramatically improve the overall character of a room.
The major difference in tiling a fireplace compared to other surfaces is the type of mortar required. Use heat-resistant epoxy (up to 400 degrees F) when tiling over wood; use heat-resistant cement-based mortars on masonry surfaces.
If a brick surround and hearth are stable and in good repair, you can tile over them. Clean them thoroughly, removing any soot, which interferes with adhesive; flatten any high spots with a rubbing stone. Spread a thin coat of heat-resistant mortar over the brick surface, leveling the mortar with a 2x4 set against 1/2-inch screed boards tacked into the mortar joints on either side of the opening. Let the skim coat dry and use it as a base for the tiles.
If the surface is in poor repair or you don't want to apply a skim coat, cover it with backerboard. Backerboard must be used when applying tile to a metal surround because most metal surrounds are not strong enough to support the weight of tile.
Surround: four to six hours (not counting prep time); hearth: about three hours
Cordless drill, mixing paddle, trowel, tape measure, straightedge, utility knife, snap cutter or wet saw, notched and margin trowels, grout float
Installing backerboard, troweling, cutting and setting tile, grouting
Clean the fireplace face; level the surface
Bucket, mortar, tile, spacers, fiberglass tape, grout, rags, sponge, water, backerboard, nails or screws, sealer
Place any insets on the field tile and mark their outlines with a china marker. Cut the field tiles and test-fit them in the design. You may have to trim the field tiles to make the design fit and still leave enough room for grout joints. Number the tiles to indicate their location before you pick them up.
Spread and comb mortar for the field tiles. Line up the bottom edges with a metal straightedge and support the tiles with 8d finishing nails driven into the backerboard. Repeat the process for the rest of the rows, setting the insets as you go. Finish setting the tiles and grout them.