, the damp blanket will present significantly less and fewer r-benefit because the humidity builds. Couple this with The truth that fiberglass insulation would not stop radiant warmth transfer (Most important source of heat circulation) and you will see why fiberglass insulation is not the advised insulation for pole barns. https://reroofing99987.thelateblog.com/29290652/the-basic-principles-of-metal-roofers