Polyiso, fiberglass face, interior
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I am converting my barn to living space, it is pretty big so cost is a factor. I have been offered a deal on fiberglass faced Polyiso and wonder about using it on the interior of the roof. I expect to put it between a layer of 1′ foil faced polyiso on either side. I plan to leave a 1″ “chute” between the roof and the initial layer of foil faced polyiso.
Am I looking for trouble anywhere?