How To Level Plywood Bathroom Floor Before Installing Backer Board

Add more mortar as necessary to fill sunken areas in.

How to level plywood bathroom floor before installing backer board.

Ceramic tile makes a durable flooring material that resists moisture and heavy traffic if it s installed properly. Leave a 1 4 gap between the backer board and walls and 1 16 gap between the sheets of backer board. Using a notched trowel apply a leveling bed of thinset mortar over the subfloor and embed the backer board sheets into the adhesive. Spread the mortar to about 3 16 thickness.

Floors are rarely perfectly level. And 3 grind the hump of the plywood. Bc plywood over the old subfloor using construction adhesive and driving 1 1 4 in. Add a layer of 1 2 in.

If the area is very large use a long straight 2 in 4 in 5 1 cm 10 2 cm board and set your level on top of it. Lay the backer board according to the manufacturer s instructions. Mix up and apply a modified thinset to a large enough area of the plywood subfloor to cover each piece of backer board using a 1 4 x 1 4 notched trowel. If the floor is uneven lift up the board until it is level so you ll know how much flooring compound you ll need to even it out.

Use corrosion resistant nails or screws to attach the cement backer board to the plywood subfloor. Remember that it is best when joints in the backer board are not aligned with the joints in the subfloor. Next place a sheet of the backer board over the wet adhesive. Before installing ceramic tile on a plywood subfloor it s important to put down a layer of cement backer board first.

The plywood adds stiffness and stability to the floor. 2 to pour self leveler on plywood directly and skip hardiback. Use a chalk line to mark the dimension of the backer board sheets onto the floor. Screws every 6 in.