Minimum foam thickness for basement floor
I live in zone 5, Western PA and will be finishing part of my basement. I have very little wiggle room to maintain code height for the finished assembly. My plan is to use glued and taped olyiso with two floating layers of 7/16 OSB staggered with a floating floor on top. Can I get away with 1/2″ foam and likely avoid summer condensation issues?
And though I don’t want to use cork for my basement floor, would this help enough to make up for the cost differences of cork flooring? I could increase the foam thickness to 3/4″, but no more.
Any advice would be appreciated.