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| Here's how air leakage causes such serious problems: Warm air in the house rises through leaks in the ceiling and walls and enters the attic. As the warm damp air gets into the cooler attic during the winter, it condenses on the wooden beams. The wood expands. When the attic gets warm in spring and summer, the wood dries and contracts. This constant process can loosen nails and cause shingles to buckle. More on this subject? Click Here. |
