Can You Tile Directly Over Oatey Shower Pan Liner?
The short answer is no, you cannot tile directly over Oatey shower pan liner. This is because Oatey shower pan liners are primarily designed to create a waterproof barrier, not to provide a stable surface for tiling.
Here's why:
Oatey Shower Pan Liners Are Not Designed For Tiling:
- Thin and Flexible: Oatey pan liners are thin and flexible, making them prone to movement and sagging under the weight of tile. This can lead to cracks in the grout and even tile failure.
- Lack of Structural Support: The liner itself does not provide the necessary structural support for tile installation. The tile needs a firm, flat surface to adhere to.
Consequences of Tiling Directly Over Liner:
- Cracking and Sagging: The liner can shift and sag, causing the tiles to crack and the grout to break down.
- Water Leakage: Water can seep through cracks in the grout and behind the tiles, leading to mold growth and damage to the subfloor.
- Uneven Tile Installation: The flexible liner can create an uneven surface, resulting in a messy and uneven tile installation.
Recommended Approach:
- Install a Backerboard: The best solution is to install a backerboard over the Oatey shower pan liner. This provides a solid, rigid surface for the tile to adhere to.
- Use Mortar Bed: A thin-set mortar bed should be applied to the backerboard to ensure proper adhesion and a smooth surface for tiling.
- Waterproof Sealant: Apply a waterproof sealant to the edges of the backerboard to prevent water from seeping behind the tiles.
Choosing the Right Backerboard:
- Cement Backerboard: A popular choice for shower walls, offering durability and water resistance.
- Modified Polymer Backerboard: Offers superior water resistance and a more rigid surface compared to cement backerboard.
By following these recommendations, you can ensure a durable and waterproof shower installation that will stand the test of time.
