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Question:

can you use cement board as a subfloor?

I am planning on replacing my current bathroom floor with 3/4 plywood. I want to use 1/4 cement board as my sub-floor. However, I am not sure if peel and stick flooring will work with cement board. Please help.

Answer:

No you do not want to use 1/4 cement board for this. 1/4 luan is a much better substrate for any vinyl product you install. Please reconsider the peal and stick, sheet vinyl is much better and longer lasting in a bathroom area.. Any questions you can e mail me through my avatar. GL
May 11, 2017
First of all, you sub-floor is the 3/4 plywood. Anything over that is overlayment. What goes over that is the flooring. I agree with the 1/4 luan. What I don't agree with is why in the world would anyone use peel and stick flooring.
May 11, 2017
I'm not sure if peel and stick adheres to cement board. Check the packaging. Why not just laminate 1/4 inch ply to the 3/4 if you need the inch.
May 11, 2017
No, it will not with any consistency. What you need to use is 3/8 partical board over your 3/4 plywood. You can find partical board in 1/4 but it is expensive and hard to find. This is typically used as a substrate material for all lino/vinyl tiles. As long as the partical board is clean and free of loose dirt, the self-stick tiles will work fine.
May 11, 2017
no and you need 1/4 luan or underlayment do not use particle board will not stick for any extended period of time
May 11, 2017

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