Can I Use 1 4 Cement Board On Floors

They also require a 3 4 inch subfloor where tile size exceeds 12 inches.

Can i use 1 4 cement board on floors.

To install cement board on floors cement board manufacturers mandate a 5 8 inch plywood subfloor or osb underlayment. Edit to add 1 bathroom is along an outside wall of the house. As long as the subfloor is 3 4 in. While cement backer boards are normally nailed to wood studs or a wood subfloor you can use thin set mortar to bond the cement boards directly to the concrete.

When i built the house i wanted all my bathrooms hallways and the kitchen floor to be tiled which was close to about 1500 square feet. The tile sits on 1 4 backer board which sits on 1 4 ply. Tongue and groove material screw the underlayment down right through the vinyl with 1 1 4 in. Both 1 4 and1 2 inch cement board are appropriate for floors.

Step 1 measure the floor and determine if and where you can use whole sheets of the cement board. That ll keep the floor thickness to a minimum. Otherwise you could probably go over the floor as is with 5 8 inch ac plywood and maybe even 1 2 inch. Can i put 1 4 cement board on the toune and groove.

Cement boards that some in sheets. The main floor is actually the second floor of the house so it s built from 3 4 inch tongue and groove plywood o. 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. Fasten the cement board sheet to the subfloor with 1 1 4 inch cement board screws.

Hi have original hardwood flooring 1907 home. Leave a 1 4 gap between the backer board and walls and 1 16 gap between the sheets of backer board. 1 bathroom is in the middle of the house with a support beam running along one wall beam runs the whole length of the house. Don t use regular drywall or wood screws which corrode in cement board.

Technical data property astm test reference 1 4 value flexural strength c947 1000 psi indention strength d2394 1250 psi weight c473 1 9 psf. An alternative to using backer board over subfloors prior to tiling. My 1950 s home has 3 4 diagonal 1x4s for the sub floor. Laura august 3 2011 at 3 08 pm.

You could then add 1 4 inch cement board an uncoupling membrane like ditra or even just paint on a liquid waterproofing like redgard. Drywall screws spaced every 6 in. Manufacturers also recommend bonding cement board to floors with a 1 4 inch polymer modified thinset coating. Layout the cement backer board at right angles to the plywood subfloor so the joints in the backer board are staggered and don t fall on joints in the plywood.

Thick cement board instead of the usual 1 2 in. Under the ply is 1 4 tounge and groove.