I recently obtained several 4”x4x8 sheets of polyiso foam board that is paper kraft faced on both side that was leftover on a job site. Will I have any issues if I insulate the rim joist of my house. I live in zone 6 and the house has vinyl siding over a thin layer of foam underpayment. Thanks for any advice
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1Are you insulating from the inside or outside? (I assume inside?) I've installed 1000s of sqft of the same type of polyiso on my house...– StayOnTargetCommented Nov 2, 2019 at 1:23
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Only if it's on fire.– MazuraCommented Nov 2, 2019 at 2:51
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Planning on installing on the rim joists in the crawl space.– Sparky 2968Commented Nov 2, 2019 at 18:07
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