, the moist blanket will give significantly less and less r-value given that the humidity builds. Few this with the fact that fiberglass insulation does not avoid radiant warmth transfer (Most important source of warmth flow) and you may see why fiberglass insulation isn't the advised insulation for pole barns. https://metalroofingcontractors22109.izrablog.com/29386704/considerations-to-know-about-metal-roofers