Can You Tile On Cement Board Outside

Can You Tile On Cement Board Outside?

Cement board is a popular backer board for tiling in both interior and exterior applications. It is a durable and versatile material that is resistant to moisture, rot, and insects.

While cement board can be used outside, there are some important considerations to keep in mind:

Climate: Cement board is not suitable for use in areas with extreme cold or freezing temperatures. The freeze-thaw cycle can cause the cement board to crack or delaminate.
Moisture: Cement board is resistant to moisture, but it is not waterproof. If the cement board is exposed to excessive moisture, it can become soft and weakened.
Slope: Cement board must be installed on a sloped surface to allow water to drain away. A slope of at least 1/4 inch per foot is recommended.

If you are considering using cement board for an outdoor tiling project, it is important to take these factors into account. By following the proper installation instructions and taking precautions to protect the cement board from moisture, you can ensure that your tile installation will last for many years to come.

How to Tile On Cement Board Outside

If you have decided that cement board is the right backer board for your outdoor tiling project, follow these steps to ensure a successful installation:

Prepare the surface: Make sure the surface is level, smooth, and free of debris. If the surface is not level, you will need to level it with a self-leveling compound.
Install the cement board: Cut the cement board to size and install it on the surface using galvanized nails or screws. Make sure the cement board is installed with the smooth side facing up.
Thin-set the cement board: Apply a thin layer of thin-set mortar to the cement board using a notched trowel. The notches will help to create a bond between the cement board and the tile.
Install the tile: Press the tile into the thin-set mortar and wiggle it back and forth to ensure that it is fully seated. Make sure the tile is level and aligned with the other tiles.
Grout the tile: Once the tile has been installed, apply grout to the joints between the tiles using a grout float. The grout will help to seal the joints and prevent water from seeping through.
Seal the tile: Once the grout has dried, apply a sealer to the tile to protect it from moisture and stains.

By following these steps, you can ensure that your outdoor tile installation will be durable and beautiful for many years to come.