I have achieved fantastic results applying epoxy over the concrete floor in my basement apartment.
I am currently doing the kitchen in my main unit. My preferred flooring choice is stone tile because the pre-existing conditions make it possible without any unknown adaptation. But I've been flirting with the idea of epoxy.
The problem is that half of the surface ( which has nothing underneath but ground,) is concrete, and the other half ( which goes over the basement ) is usual wood construction consisting of 2×8 joists + 3/4" OSB, which I'm reinforcing with 1/2" plywood and 1/4" cement-board.
I know that epoxy can go easily over the concrete half but how about the cement-board?
Can I apply something over the cement-board, like self leveling compound, to cover the seams and screws and achieve a concrete-like surface that would equalize it with the concrete side so that I can apply the epoxy primer and then epoxy itself?
Best Answer
Cement board isn't intended as a finished floor. It's not as dense as concrete. You'd find high heels and chair legs punching into it in short order, leaving you with a crumbly mess. Obviously you'd also have to tape all the seams and skim the screw holes, but you'd still have air voids across the entire surface to deal with.
I'd try epoxy over good (hardwood veneer?) plywood before cement board.