, the damp blanket will supply much less and fewer r-benefit given that the moisture builds. Few this with The point that fiberglass insulation doesn't protect against radiant heat transfer (Most important source of warmth movement) and you can see why fiberglass insulation isn't the advisable insulation for pole barns. https://donovanisaks.thenerdsblog.com/34509507/the-fact-about-local-metal-roofing-contractors-that-no-one-is-suggesting