Used 3″ Rigid Polyiso Insulation
Had a quick question regarding used polyisocyanurate . I have an opportunity to purchase 3″ X 4′ x 8′ sheets that are reclaimed and 4 years old, they are paper faced on both sides.
The plan is to have 2×4 wall with 2 layers of the 3″ polyiso on the outside (6″ total) . All above ground.
Is there any reason I cannot use them for my exterior wall insulation?
Any issues with used Polyiso? or paper faced?
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