Can You Tile Straight On Cement Board

By | March 19, 2024

Can You Tile Straight On Cement Board?

Cement board is a popular backer board for tile installations due to its strength, durability, and moisture resistance. It is often used in wet areas such as bathrooms and kitchens, but can it be used as a direct substrate for tile?

The answer is yes, you can tile straight on cement board without the need for an additional layer of plywood or drywall. However, there are a few important factors to consider to ensure a successful installation:

  1. Surface preparation: The cement board surface must be clean, level, and free of any debris or imperfections. Any unevenness or rough spots will telegraph through the tile, creating an uneven surface.
  2. Thin-set mortar: Use a modified thin-set mortar that is specifically designed for cement board installations. This type of mortar will provide a strong bond between the tile and the cement board.
  3. Notching: Use a trowel with a notched edge to apply the thin-set mortar. The notches will help to create a mechanical bond between the mortar and the tile, ensuring a secure installation.
  4. Tile size and spacing: Smaller tiles are more likely to telegraph any imperfections in the cement board surface. If you are using larger tiles, you can get away with a less-than-perfect surface. Use spacers to ensure even spacing between the tiles.
  5. Grout: Use a grout that is specifically designed for cement board installations. This type of grout will be less likely to crack or discolor over time.

By following these steps, you can achieve a successful tile installation directly on cement board. This can save you time and money compared to installing an additional layer of plywood or drywall.

Additional considerations:

  • If the cement board is installed in a wet area, it is important to use a waterproof membrane behind the cement board to prevent moisture from penetrating the substrate.
  • Cement board is a heavy material, so it is important to make sure that the subfloor is strong enough to support the weight of the tile installation.
  • Always follow the manufacturer's instructions for the specific cement board and thin-set mortar you are using.

By paying attention to these details, you can ensure a beautiful and long-lasting tile installation on cement board.


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