To install porcelain tile, remove the old flooring, apply thin set with a trowel, lay cement boards, apply more thin set on top of the cement boards, and lay out the tiles. Once the tiles are set, mix and apply the grout.
- Demolish the old floors
Remove the existing flooring, including the trim and subflooring. Scrape off any glue, and make sure the surface is level. Vacuum up any dust and debris.
- Prepare the subfloor
In a bucket, mix thin set and water until it reaches the consistency of peanut butter. With a 1/4-by-1/4-inch square-notched trowel, apply the thin set to the cleaned subfloor.
- Position the cement board
Score and snap the cement boards to size, and place them in the fresh thin set. Stagger the boards to break up the seams.
- Secure the cement boards
Nail roofing nails every 8 inches on the center of each board. Then, apply cement board tape along the seams.
- Lay out the tiles
Mix another batch of thin set. Starting at the center of the room, apply a layer of thin set, and position the tiles on the floor. To keep the tiles straight, use spacers to align them. Let the tiles set overnight.
- Mix and apply the grout
In a bucket, mix the grout until you can form it into a ball. Remove the tile spacers. Using a grout float, apply the grout to the joints at a 45-degree angle. Wipe excess grout with a wet sponge. Let the grout dry completely before use.