The foil facing on Foil/FSK-faced insulation acts as a flame-retardant vapor barrier with reflective properties for radiant energy. That means the foil facing can reflect heat back rather than simply slowing its transfer. Because of this, Foil insulation is especially ideal for attic ceiling applications as well as duct wrap, duct board, and HVAC ductwork. Drywall Supply distributes a variety of Foil-faced fiberglass insulation batts.

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