Subfloor for Existing Slab on Grade
I’m having trouble finding advice on first floor slabs, as opposed to finished basements. I have a 1970’s colonial in the southern part of zone 6a that is mostly slab on grade. We don’t have good head room. An inch would be the max for subfloor, and even then, I’m not sure it would work with the front door. We are planning on using Marmoleum click flooring. Heat will be mini split with pellet stove as needed. Is the insulation essential to preventing moisture going to the cold floor? We’re considering Insul-armor because of that. Building inspector is still trying to get an answer from them for fire code. I’d like to use something thinner like DryBarrier or DmxAirflow. Thoughts?
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