Install 4 Cement Boards To Be Screwed To Sub Floor

Place the screws no more than 3 in.

Install 4 cement boards to be screwed to sub floor.

Tongue and groove material screw the underlayment down right through the vinyl with 1 1 4 in. Structural panel concrete subfloor. While using 1 4 thick rather than 1 2 thick cement backer board is acceptable how you install the backer board and attach it to the plywood subfloor is as important as how you lay the tile on top of it. I plan on thinsetting and screwing cement board to the subfloor then redgard then thin set and tile.

Thick cement board instead of the usual 1 2 in. Cement backerboard is a thin layer of concrete with fiberglass mesh on both sides. Drywall screws spaced every 6 in. It s available in sheets of many sizes with 3 foot by 5 foot sheets being the most common.

Screws every 6 in. If the subfloor doesn t have enough stability you can usually but not always remedy the situation by installing cement backer board also called cementboard. Would this calculation get me to the right height compressed thin set on top of sub floor 1 8 cement board 1 2 compressed thin set on top of cement board 1 8. Fasten the cement board sheet to the subfloor with 1 1 4 inch cement board screws.

For ceramic tile floors the cement board usually rests on a plywood subfloor minimum 5 8 inch thick exterior grade plywood or osb if new ceramic tile is being laid on an existing floor the cement board can usually be laid right over the existing floor finish provided it is in good shape and the extra floor thickness is not a problem. 4 50 sf msrp based upon full truckload delivered to job site. Here s the right way to attach cement backer board to a plywood subfloor. As long as the subfloor is 3 4 in.

See code reports below. When installing a ceramic tile floor on a concrete subfloor you don t have to worry about flexing as long as the concrete slab is at least 1 1 8 inch thick which most slabs are. I need to match the height of the existing tile in the bathroom. Screws have better hold down power than nails and will help prevent boards from loosening or cupping.

Add a layer of 1 2 in. Cement boards that some in sheets. These are specially coated corrosion resistant screws that have notches under their heads that help the screws burrow into the board so the heads sit flush with the panel. Whenever you re laying tile on a wood subfloor you need to first install cement backerboard to prevent leaks and water damage.

Bc plywood over the old subfloor using construction adhesive and driving 1 1 4 in. Screw the old floorboards to joists with 2 in.