Fitting mosaic tiles for swimming pools requires precision and expertise to ensure a seamless and visually appealing finish. Professional pool installers use different techniques to ensure the tiles are securely fixed and resistant to water damage. Some common methods include: Thinset Mortar: This traditional technique involves applying a layer of thinset mortar on the pool surface and then carefully placing each mosaic tile. Once the mortar dries, grout is applied to fill in the gaps, providing stability and a polished look. Mesh-Mounted Sheets: In this approach, mosaic tiles are pre-mounted on mesh sheets, making the installation process more efficient. The sheets are placed on the pool surface, and the tiles are secured by pressing them into the thinset mortar. After drying, the mesh sheets are removed, leaving behind a flawless mosaic design.d well.