How To Install Cement Board Over Shower Pan Liner

How to Install Cement Board Over Shower Pan Liner

Installing cement board over a shower pan liner is a crucial step in creating a waterproof and durable shower system. Cement board provides a stable base for tile installation, while the shower pan liner protects the underlying subfloor from moisture damage.

Here's a comprehensive guide on how to install cement board over shower pan liner:

### Materials You'll Need * Cement board * Shower pan liner * Thin-set mortar * Cement board screws * Screws * Measuring tape * Level * Notched trowel * Drywall saw * Safety glasses * Dust mask ### Safety Precautions 1. Wear safety glasses and a dust mask to protect yourself from dust and debris. 2. Make sure the work area is well-ventilated. ### Preparing the Shower Pan Liner 1. Inspect the shower pan liner for any tears or punctures. Repair any damaged areas with a patch kit or replace the liner if necessary. 2. Spread a thin layer of thin-set mortar over the shower pan liner using a notched trowel. 3. Press the cement board into the mortar, ensuring that it is flat and level. 4. Screw the cement board into the shower pan liner using cement board screws. Space the screws approximately 6 inches apart. ### Installing the Cement Board 1. Measure and cut the cement board to fit the shower area. 2. Spread thin-set mortar on the subfloor using a notched trowel. 3. Place the cement board over the thin-set mortar, aligning it with the edges of the shower pan liner. 4. Screw the cement board into the subfloor using screws. Space the screws approximately 12 inches apart. 5. Fill the gaps between the cement board and the shower pan liner with thin-set mortar. ### Finishing Up 1. Once the thin-set mortar has dried, tape the joints between the cement board panels with fiberglass mesh tape. 2. Apply a thin layer of thin-set mortar over the fiberglass mesh tape and smooth it out with a trowel. 3. Allow the thin-set mortar to dry completely before tiling the shower. ### Tips for Success * Use a level to ensure that the cement board is installed flat and level. * Countersink the screws slightly below the surface of the cement board. * Allow the thin-set mortar to dry completely before proceeding to the next step. * Wear appropriate safety gear to protect yourself from dust and debris. ### Conclusion Installing cement board over shower pan liner is a relatively straightforward process that can be completed in a few hours. By following these steps carefully, you can create a waterproof and durable shower system that will last for many years to come.