Polyiso for basement floor?
I have an unfinished basement with essentially a dirt floor (with a thin layer of crumbly cement) and a rubble foundation. I’d like to dry the basement by installing 6 mil sheeting on top of the floor and up the basement wall to the sill beam. I have a stack of 3” reclaimed polyiso insulation left over from a roofing job. Can I lay the polyiso on the basement floor on the sheeting and then cover ut with 1/2” plywood?
The basement is only used for storage. I know polyiso can not be used for ground contact, but can I use it on the basement floor Over a vapor barrier and be walked on? Thanks.
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