Using recycled rigid foam
I’m considering using rigid foam on the exterior of my roof. Cost is of course a big concern with this approach. I’m found sites online that sell recycled rigid foam. Apparently, it is often recovered from commercial buildings and shipping containers.
I read one post on the site that caution against using foam that had been degrade during freeze/thaw cycles. Are there any other issues to look out for? Have anyone tried the “recycled” approach? Is there a reputable source for material? Any lessons learned you folks could share would be greatly appreciated.