Vapor permeability of polyiso
Attached is a picture of foil-faced polyiso which as a bunch of holes in it. The holes were made with a wall paper removal tool which puts holes in the paper to allow liquid stripper to get behind the paper. I welcome comments on this approach to see of foil faced polyiso could be modified to allow vapor permeability thru the sheet if holes were done on both sides.
I was given 22 brand new sheets. In there current impermeable form I cannot use them. I need a product which will allow drying of a cathedral ceiling to the inside of the home . I can hang onto them for a future project but I would rather use them up now if possible.
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