- 1). Remove the shower head, faucets and any other fixtures from the walls. Use your electronic studfinder to locate the studs behind the shower walls. Mark along them with your pencil.
- 2). Working one wall at a time, use your notched trowel to spread thinset mortar on the wall, from the top to the bottom. Set your sheets of cement backerboard in place, cutting them to size by scoring them with a razor knife and snapping them. Use a hole saw to cut out holes as needed to go around the fixtures. Sink galvanized screws all along the studs with your screwgun, putting screws every foot or so.
- 3). Repeat the process for each of the walls. Spread thinset mortar over all the seams between the pieces of backboard. Smooth out the mortar with the straight side of your trowel. Let it dry.
- 4). With your level, mark a vertical line through one wall of the stall, from top to bottom. Use your notched trowel to spread thinset mortar on one side of the line, at the floor, covering a few square feet. Set your first tile into place alongside the line, at the floor. Press the tile and twist it slightly to get a good seal with the mortar.
- 5). Lay additional tiles off the first one, and off the center line, spreading mortar as needed. Hang all the full tiles that will fit, cut out holes for the fixtures as needed with your tile saw. Cut the tiles for the edges as needed on your tile cutter.
- 6). Lay strips of duct tape over each vertical row of tiles, from top to bottom, to hold them all in place while the mortar dries. Repeat the whole tiling process for each of the walls. Let the tiles set overnight. Remove the duct tape.
- 7). Scoop up your pre-mixed grout with your rubber grout float and apply to the first wall starting at the top. Run the float across the tile with the long side pressed against the tile face, to squeeze grout into the lines and off the tile surface. Don't grout the vertical inside corners where the wall meets the other walls, and don't grout the horizontal line along the floor, but do all the other lines. Use a damp sponge to wipe down the tiles the remove the excess grout. Repeat for each of the walls.
- 8). Let the grout set for a day. Caulk the vertical corners between the walls, and the horizontal corner against the floor. Let the grout cure according to the instructions on the grout packaging (it may take more than a week). Apply grout sealer over the grout lines with the applicator sponge on the grout bottle.
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