How To Install Cement Backer Board For Tile Floor

The edges of the cement board should be no closer than 8 inches to the joints in the subflooring.

How to install cement backer board for tile floor. Embed the cement board and screw it to the underlayment with special 1 1 4 in. Next place a sheet of the backer board over the wet adhesive. Plan the placement of the cement backerboard sheets. Plan so the joints in the backerboard won t line up with the joints in the subfloor.

How to install cement backerboard for floor tile. Install the first sheet. Then spread thinset mortar with the flat side of a 1 4 in. Mix and apply the mortar.

Notched trowel and use the notched edge to comb the mortar. Leave a 1 4 inch gap between the board and any adjacent walls. Precut and fit all the cement board and then lift all of the cement boards out. Second the strength of wood boards isn t always consistent.

Cement board screws spaced every 4 in. Make a rough plan for the cement board sheet layout based on the area to be covered and the size of the cement board. Use a chalk line to mark the dimension of the backer board sheets onto the floor. Remember that it is best when joints in the backer board are not aligned with the joints in the subfloor.

Place the first cement board sheet lay the first sheet of cement board onto the mortar so the rough side of the board is facing up. 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. The backerboard should completely cover the subfloor joints.

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