How To Level Plywood Bathroom Floor Before Installing Backer Board

Screws every 6 in.

How to level plywood bathroom floor before installing backer board.

And 3 grind the hump of the plywood. Add a layer of 1 2 in. Bc plywood over the old subfloor using construction adhesive and driving 1 1 4 in. With the plywood in place install the backer board as you normally would.

Using a notched trowel apply a leveling bed of thinset mortar over the subfloor and embed the backer board sheets into the adhesive. Lay the backer board according to the manufacturer s instructions. The plywood adds stiffness and stability to the floor. Ceramic tile makes a durable flooring material that resists moisture and heavy traffic if it s installed properly.

Floors are rarely perfectly level. 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. Use a chalk line to mark the dimension of the backer board sheets onto the floor. Before installing ceramic tile on a plywood subfloor it s important to put down a layer of cement backer board first.

Spread the mortar to about 3 16 thickness. Add more mortar as necessary to fill sunken areas in. In order to level the subfloor to install tile the builder suggests 1 to put a paper on plywood and pour self leveler and skip hardibacker. Using the trowel spread adhesive and ridge it with the notched side of the trowel.

2 to pour self leveler on plywood directly and skip hardiback. Next place a sheet of the backer board over the wet adhesive. Leave a 1 4 gap between the backer board and walls and 1 16 gap between the sheets of backer board. Use corrosion resistant nails or screws to attach the cement backer board to the plywood subfloor.