Install 4 Cement Boards To Be Screwed To Sub Floor

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.

Install 4 cement boards to be screwed to sub floor.

Here s the right way to attach cement backer board to a plywood subfloor. Fasten the cement board sheet to the subfloor with 1 1 4 inch cement board screws. 4 50 sf msrp based upon full truckload delivered to job site. Durable non combustible concrete subfloor panels offering fast installation structural stability and 1 and 2 hour fire rated assemblies.

I need to match the height of the existing tile in the bathroom. Drywall screws spaced every 6 in. 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. As long as the subfloor is 3 4 in.

Cement backerboard is a thin layer of concrete with fiberglass mesh on both sides. It s available in sheets of many sizes with 3 foot by 5 foot sheets being the most common. Screw the old floorboards to joists with 2 in. Thick cement board instead of the usual 1 2 in.

Place the screws no more than 3 in. Cement boards that some in sheets. Add a layer of 1 2 in. 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.

See code reports below. Don t use regular drywall or wood screws which corrode in cement board. 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. I plan on thinsetting and screwing cement board to the subfloor then redgard then thin set and tile.

Screws have better hold down power than nails and will help prevent boards from loosening or cupping. 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. 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.

Bc plywood over the old subfloor using construction adhesive and driving 1 1 4 in. Screws every 6 in.