1

I am renovating my kitchen and bathroom. My house was built in 1952. I will be installing ceramic floors in both. I have 5-1/2 x 3/4 tongue and groove boards running diagonally and nailed to the floor joists.

If I use 3/4" t&g plywood followed by 7/16" cement board and then tile my floor will be too high. What is the best method to prep for tile?

1

3/4" t&g plywood (not OSB) over 3/4" boards would be adequate by itself, in my opinion. The industry often suggests 1-1/4" as a minimum, and you'd exceed that.

  • I would agree in many older homes that had solid floors like yours tile can be put directly on the plywood, I did a job for my mom over 30 years ago and it is on plywood over T&G and it still looks good although a bit dated. – Ed Beal Feb 9 '18 at 23:23
-2

Only good answer is go down. Cut the substrate boards, install quality 3/4" tongue & groove plywood, install cementboard.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.