Thinset Under Cement Board On Floor

If i thinset the cement board down using a 1 4 x 1 4 trowel and screw it every 8 will the thinset end up being 1 8 thick.

Thinset under cement board on floor. Yes it is needed unmodified is fine for this it s there to fill any voids if the floor is out of level this should be fixed after the board is down thinset under the boards won t help there the boards will follow any contour of the floor when screwed down. Then spread thinset mortar. Apply a supporting bed of mortar or modified thinset to subfloor using a 1 4 square notched trowel. It sounds like the cement backer board was not attached properly to the subfloor using thin set adhesive screws and fiberglass tape on the joints.

You ll never have a squeek and because it s an engineered product it s naturally 200 more water proof than plywood. Precut and fit all the cement board and then lift all of the cement boards out. Embed the cement board in latex modified thin set mortar the main reason for using thin set between the cement board and the subfloor isn t as much for bonding as it is for even void free cement board support throughout the floor. Our agreement was to put down cement board and tile.

For best results especially on floors concrete board should be installed at least one day prior to installing tile. The manufacturer says to use thinset under your hardie. Just went to inspect some work and noticed they weren t using thinset to lay down the cement board under porcelain tile. Cement board commonly sold under trade names such as durock hardiebacker and wonderboard is now the standard underlayment used for ceramic porcelain or stone tile laid with thinset mortar adhesive cement board is used for most floor tile and has all but replaced plywood and drywall backer materials for wall tile applications in wet areas like showers and tub surrounds.

On top of the 2 6 will be 3 4 subfloor thinset cement board redgard thinset tile. This gives the thinset time to harden which reduces the chance of loosened. I d like to get as close as possible to matching the height of the existing tile. Install your 3 4 plywood if you like but i use 3 4 sturdi floor which is an engineered t g osb type of board and it s a great product.