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Unvented Attics: Encapsulating with Spray Polyurethane Foam

November/December 2013
A version of this article appears in the November/December 2013 issue of Home Energy Magazine.
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November 01, 2013
Why do we vent attic spaces? The most common reasons are to reduce the amount of moisture accumulation, to prolong shingle life, to prevent ice dams, and to reduce the amount of heat gain through the ceiling below.

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