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Cellulose for Attics

• When cellulose is blown into attics it provides a thick continuous blanket that that provides excellent insulation.  The product is denser then fiberglass and does a better job with air sealing.  It is not an air barrier though.
• It is extremely crucial in an attic to seal off air passageways like plumbing and electrical penetrations for maximum value and comfort.  This can be done by hand or using Air-Tite spray foam insulation.  Can lights should also be kept clear of cellulose.
• An extremely effective way to insulate is to skim coat the attic with spray foam insulation for air sealing, then insulate over with cellulose or fiberglass for the added R-Value.