How To Install Cement Board For Shower Walls

How to Install Cement Board for Shower Walls

Installing cement board for shower walls is a crucial step in creating a waterproof and durable foundation for your bathroom. This guide will provide you with the essential steps and techniques to ensure a successful installation.

Materials You'll Need:

- Cement board - Thinset mortar - Cement board screws - Level - Measuring tape - Pencil or chalk line - Safety glasses - Gloves

Step 1: Prepare the Walls

- Remove any existing drywall or paneling from the shower walls. - Ensure that the studs are spaced at 16 or 24 inches on center. - If the walls are uneven, use shims to level them before installing the cement board.

Step 2: Cut the Cement Board

- Measure the height and width of the walls and cut the cement board to size using a utility knife. - Score the cement board along the cut line and snap it to break.

Step 3: Mix the Thinset Mortar

- Follow the manufacturer's instructions to mix the thinset mortar. - The consistency should be similar to peanut butter, thick enough to hold the cement board in place but not too runny.

Step 4: Apply the Thinset Mortar

- Apply a thin layer of thinset mortar to the back of the cement board using a notched trowel. - Use firm pressure to ensure good adhesion.

Step 5: Install the Cement Board

- Place the cement board against the wall and press it firmly into the thinset mortar. - Use a level to check for level and adjust the position of the cement board as needed.

Step 6: Secure the Cement Board

- Drive cement board screws through the cement board and into the studs. - Space the screws approximately 6 inches apart and countersink them slightly below the surface.

Step 7: Tape and Seal the Joints

- Apply alkali-resistant mesh tape to the joints between the cement board panels. - Spread a thin layer of thinset mortar over the tape and smooth it out.

Step 8: Let the Thinset Cure

- Allow the thinset mortar to cure for at least 24 hours before applying any additional layers or waterproofing materials.

Additional Tips:

- Wear safety glasses and gloves during the installation process. - Use galvanized or stainless steel screws to prevent rust. - Consider using backer boards to support the cement board in areas with studs that are not on center. - Allow the cement board to acclimate to the room temperature for 24 hours before installing it.