1/2" nontoxic underlayment suitable b/w slab and floating cork?
I'm stumped. I have a section of floor (about 7'x10') that I need to raise just half an inch to be able to hit level with the other flooring I want to lay almost 400sq ft of floating cork planks on. I have a baby in the house, so using something that does not emit chemicals into the air is especially vital to me.
heres my dilemma. I'm on a concrete slab, trying to raise it to meet tile that is already laid and that I really don't want to take up because of the mess and noise (due to aforementioned baby). This is where the half inch comes in. I can't just lay plywood, since everything I find indicates that plywood underlayment a need to be over half an inch thick. The Eco friendly vapor barrier underlayments I see are only about 1/8" thick though. I considered a concrete underlayment self leveler like ardex and then saw how toxic it was and decided that is also a no go. It's looking like I'm stuck jacking up about 300 sq feet of tile so that I can start fresh, but I thought I would check here first in case someone else had an idea for me. The trick, obviously, is the combined need for thickness, vapor barrier, and indoor air quality. I know it may be an impossibility, but I am hoping I'm wrong.