Shower pan – There are a few types of shower pans that do not accept tile well, namely, fiberglass and acrylic, but some of the do-it-yourself constructed shower pans are ideal for tiling. Be sure to build a dense shower pan using a strong mortar base with a solid vinyl membrane liner, because the tile and grout does not hold water. Tile adds to the aesthetic value of the shower, not to the structural support.
Install shower pan tile, Start installation shower pan tile in the center of the base near the drain. An ideal shower pan tile is 4 inches by 4 inches. If you need to cut the tiles, use a wet saw. Using a thin-set of spreading spatula and spread thin set mortar on the back of the tile. Apply the tile on the pan and press down for about 10 seconds. The mortar on the shower pan and thin set works together to keep the tile in place.
Continue placing tile over your shower pan and up the short side walls, working out from the drain. Let a 1/8-inch gap between all the tiles for the grout. Let the tiles set for 24 to 48 hours. Apply a strip of non-sanded grout to the spaces between the tiles with a small rubber trowel. Use a wet cloth to wipe up any excess. Apply a sealer to prevent moisture from seeping through the joints.