Can I tile over cement board?
John Castro
Published Jan 22, 2026
Cement board forms a durable, stable base for tile, and it has no organic materials (unlike drywall, greenboard, or plywood) so it is not prone to mold, rot, shrinkage, or decomposition due to moisture. Ceramic tile laid over cement board is one of the most durable floor or wall surfaces you can install.
Do I need to seal cement board before tiling?
Although most backerboards currently available won't fall apart when exposed to moisture and are somewhat water-resistant, they aren't waterproof. To prevent moisture from seeping through to the wood or metal studs beneath the tile, a barrier or sealant must be used on porous materials.How do you tile over backer board?
How to Install Wall Tile Over Backer Board
- Remove All Dust. ...
- Apply Tile Adhesive. ...
- Apply Moisture-Resistant Silicone Caulk. ...
- Make Your Mark. ...
- Mix and Spread Your Thinset. ...
- Set Your First Tile. ...
- Create a Pattern With the Tiles. ...
- Fit Tile Around Fixtures and Outlets.