Reclaimed polyiso that has been exposed to weather
I’ve been looking around for sources of reclaimed insulation. I found a listing on my local Craigslist with the attached photos. 1 1/2″ thick 4×8 sheets of used polyiso for $15 a sheet. I am considering buying enough for 2 layers of interior insulation on my basement walls.
Should I be concerned that it has been stacked and stored outside, apparently uncovered, exposed to the weather?
The listing doesn’t say (and I haven’t called yet), but these appear to have a black felt coating. If it is felt coated, is exposure to weather a bigger concern?
More general question… Is felt coated OK to use as basement insulation?
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