If you’re installing backer board in new construction, attaching it directly to flooring joists, opt for 1/2 inch sheets. Backer board installs to a subfloor with a layer of thinset.
It will break or dislodge if the surface bends underneath the load. Cement backer board is commonly used as a tile base on plywood or OSB subfloor. Cement backer board on concrete as a subfloor or underlayment is usually not really helpful or wanted. In most instances, you can apply tile directly to the concrete. Cement backer board is a reasonable, convenient building materials that makes tiling, flooring, and countertop initiatives go sooner and look better in the long run.
Both layers, together, can add another 1/8 inch to the finished floor. A plywood subfloor should be structurally sound and in a position to support the installation.
Solved! Yes, You Can Tile Over Tile
- Gypsum board may also