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The attic is the single most important area to air seal.

The attic is the single most important area to air seal and this should be done before any insulation is completed. There are many places to air seal including chimney chases, metal flue vents, wiring and plumbing holes, electrical fixtures, interior and exterior walls, attic hatches, dropped soffits, ductwork penetrations and openings over stairways. Properly sealing these areas can greatly reduce the stack effect (movement of air into and out of buildings) in any home.

Published Thursday, April 16, 2009