Why should I use a heavyweight radiant barrier?

Both the lightweight and the heavyweight radiant barrier foils have the same reflectivity quality; the difference is the lightweight products can tear easily. WarehouseFoil.com only sells the heavyweight foil because it is virtually tear-proof and will never rip or sag in your building. One loose critter in your attic can easily knock down all the foil if you use a lightweight product.
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