What is the purpose of an attic vent?

Attic ventilation is one component in a proper roof system. If the attic area doesn't have proper air flow your attic space will be prone to mold growth, shortened shingle lifespan and ice dams may form during winter cold snaps. In the following article I'll describe the most common way attics are ventilated today and a couple of ways to increase the airflow where necessary.

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