While it is possible to install tiles directly on damaged drywall, it is not recommended. Damaged drywall may not provide a stable surface for the tiles, leading to possible cracking or loose tiles over time. Moreover, damaged drywall may not offer sufficient moisture resistance and could result in mold growth behind the tiles.
Using Backer Board or Cement Board:
To ensure a successful tile installation on damaged drywall, it is advisable to use backer board or cement board as a substrate. These materials provide a stable, moisture-resistant surface that will support the weight of the tiles.
Steps to Installing Tiles on Backer Board/Cement Board:
1. Measure and Cut the Board:
Measure the area to be covered and cut the backer board or cement board to fit using a circular saw or carbide-tipped scoring knife. Ensure a snug fit without any gaps.
2. Fasten the Boards:
Secure the backer board or cement board to the drywall using screws. Place screws every 6-8 inches along the edges and every 12 inches throughout the center of the board.
3. Apply the Thinset:
Mix thinset mortar according to the manufacturer’s instructions, and apply it to the backer board or cement board using a notched trowel. Spread a thin, even layer, ensuring full coverage.
4. Install the Tiles:
Place the tiles on the thinset mortar, pressing them firmly to ensure they adhere properly. Use tile spacers to maintain consistent spacing between the tiles. Allow the thinset to cure according to the manufacturer’s instructions.
5. Grouting and Finishing:
Once the thinset has cured, remove the tile spacers and apply grout to the gaps between the tiles using a grout float. Clean off any excess grout, and after it has dried, apply a grout sealer to protect it.
While it may be tempting to install tiles directly on damaged drywall, it is best to repair the damage first. Repairing the drywall ensures a stable and moisture-resistant surface for your tiles, preventing potential issues down the line. Using backer board or cement board as a substrate further enhances the stability and longevity of your tile installation. By following the necessary steps and utilizing the right materials, you can achieve a successful tile installation that will enhance the beauty and functionality of your space.