Installing ceramic tiles in a pool involves cleaning and leveling the pool surface, spreading mortar over the surface, laying tiles over the mortar and grouting the tile joints. Select ceramic tiles that are waterproof to prevent water penetration in case of cracks. Additionally, choose mortar and grout that can stand the wet conditions and chemicals of the pool. A latex-fortified thinset mortar and epoxy-free grout are suitable.
Cleaning the pool surface allows the mortar to be in direct contact with it, reinforcing the bond between the two. This process involves clearing the surface of water chemicals, dirt and debris using a pressure washer. After cleaning the surface, repair any cracks or holes to make it level, and protect it by applying a waterproofing membrane. Allow the paint to dry, and lay the tiles over the surface in a suitable pattern, cutting them as needed to fit in the corners and surface ends.
Next, set the tiles aside, apply an even layer of the mortar over the surface, and lay the tiles over the mortar in the chosen pattern, working a small area at a time and taking care to ensure uniform spacing between the tiles. Using a rubber mallet, level the tiles by tapping them through a beating block, and repeat the process to tile the remaining surface. Finally, fill in the grout joints after the mortar has dried to complete the process.