1. Measure your walls and purchase the right amount of tile. Make sure you also buy grout, adhesive, and any other supplies you will need.
2. Clean the walls thoroughly and make sure they are flat and level.
3. Spread adhesive on the wall in small sections and begin installing the tiles. Use spacers to maintain even grout lines.
4. Once all the tiles have been installed, mix the grout and spread it over the tiles using a rubber float. Wipe away the excess with a damp sponge.
5. Allow the grout to dry for the recommended time before applying any sealant.