Just as proper ventilation and insulation are required to regulate attic temperature, exhaust vents passing through must be configured to regulate moisture.
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Building science has come a long way, but many homes in the area haven’t been updated to protect against one of the worst winter hazards: ice dams.
People are always asking me about the age and condition of the shingles, but they often overlook the fact that the roof is an entire system composed of multiple components that must work together in order to keep the water out.