![]() ![]() If you insist on using fiberglass, use it in conjunction with Prodex Total, so the Prodex can keep the moisture out of the fiberglass.įor those of you the like to get into the weeds, I'll explain in more depth why fiberglass loses R-value once wet.įiberglass insulation is composed of woven fiber stands. Avoid an insulation that collects moisture, attracts mold, cracks and needs to be replaced. At some point, when you're exposed to the toxic fibers, you'll be forced to remove the insulation - Hopefully before it does too much damage to the metal framing. Behind the white vinyl is a wet, mold filled blanket that will eventually cause the white vinyl to crack and fall off. This is due to the added weight of water. Take a look at the white vinyl facing the next time you're in a metal building - It will be either sagging, or sagging and flaking. When warm air comes in contact with the cool metal sheet, condensation occurs. In cold weather it rapidly releases the heat out of your building. In hot weather, metal framing and sheeting rapidly radiate the sun's heat into a building. Metal is a very good conductor of heat and cold. Couple this with the fact that fiberglass insulation does not prevent radiant heat transfer (primary source of heat flow) and you can see why fiberglass insulation is not the recommended insulation for pole barns.Įver wonder why it's so hot and wet inside a metal shed in the summer and so cold and wet in winter? The metal skin magnifies the heat of the summer sun and frigid temperatures of the winter. Not only will you have trapped moisture in the blanket causing rot, rust, oxidation, mold etc., the damp blanket will provide less and less R value as the moisture builds. Once fiberglass insulation gets damp, it will stay damp. Metal building insulation blankets (fiberglass), lose R-value once damp (and it will get damp in a metal building). ![]() The Prodex R-value is not affected by humidity. To combat this you need an insulation that doesn't lose its thermal protection when you need it most! Once metal sheeting gets cold it creates a situation where it's colder inside the building that out. I thought I had a Higher R-value - Fiberglass Insulation Blankets Lose R-value If two products have the same R-value, they have the same efficiency in stopping heat transfer. R-value is the measurement of a material's ability to stop heat transfer. This also adds to the condensation problem. The cold sheeting creates the effect of an ice box making it colder inside the building than out. It makes it unbearably hot and humid inside.Ĭold - Winter temperatures turn metal sheeting cold. Heat - Mid-summer sun rays hitting the metal sheeting radiates downward (inside). ![]()
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