How To Install Cement Backer Board For Tile Floor

Using the trowel spread adhesive and ridge it with the notched side of the trowel.

How to install cement backer board for tile floor.

Next place a sheet of the backer board over the wet adhesive. Notched trowel and use the notched edge to comb the mortar. Do a dry run and lay the backerboard down to fully cover the area you plan to tile. Make a rough plan for the cement board sheet layout based on the area to be covered and the size of the cement board.

According to backer board manufacturers and tile setters installing backer board directly over an old solid wood subfloor is risky for a couple of reasons. First changes in humidity make solid wood shrink swell and cup more than plywood. Am i correct in assuming that i can tile immediately after installing the cement board on the floors. Cement board screws spaced every 4 in.

The backerboard should completely cover the subfloor joints. Plan the placement of the cement backerboard sheets. Then spread thinset mortar with the flat side of a 1 4 in. The edges of the cement board should be no closer than 8 inches to the joints in the subflooring.

Second the strength of wood boards isn t always consistent. Leave a 1 4 inch gap between the board and any adjacent walls. I used to wait before overnight while letting the thinset cure but now i m starting to realizing that s almost an entire day wasted. Plan so the joints in the backerboard won t line up with the joints in the subfloor.

Use a chalk line to mark the dimension of the backer board sheets onto the floor. Embed the cement board and screw it to the underlayment with special 1 1 4 in. How to install cement backerboard for floor tile. Precut and fit all the cement board and then lift all of the cement boards out.

Remember that it is best when joints in the backer board are not aligned with the joints in the subfloor.