Set the first tile in place using a twisting motion to seat it firmly. You might also want to check the layout with a framing square occasionally to make sure your lines are straight. Some tiles will need to be trimmed to fit around drain openings and along the walls. To trim the tiles, use a wet saw, which has a diamond-edged blade cooled by water. Mix your grout according to the manufacturer's instructions.
Most grouts are mixed to the consistency of peanut butter or toothpaste.
Scoop out a dollop of grout with your grout float. Then spread the grout over the tiles. Scrape off excess grout with the float and allow the grout to set up. After it 's cured for about 20 minutes, give the tiles a good cleaning with a damp sponge. Keep the sponge clean and damp, and be careful not to pull grout out of the joints.