Can you use Comfortboard mineral wool insulation as a skirt on monolithic slab?
...slab and trying to reduce the amount of foam in the assembly. I'm wondering if I could use comfortboard sheets as my horizontal frost protection skirting on the outside of the slab? It is an 18x16 slab, on a very well drained crushed stone pad. Roxul tech support was not very helpful with this question (she seemed u...