Ensuring your home has the proper attic ventilation according to these guidelines, however, can save yourself the stress and hassle of an emergency roof repair. And the extra heat is not just a summer concern-come winter, hot attic air can melt snow on the roof during the day only to refreeze when temperatures drop overnight, creating ice dams that lead to interior leaking and roof damage. Sealed attics trap excessive heat and moisture, which can lead to reduced shingle life. The science behind attic ventilation, however, is sound. At first glance, it can seem counter-intuitive: You insulate your home to reduce temperature fluctuations and save on utility bills, but then you allow fresh air to flow through the attic no matter the time of year.
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