Insulating Ac Ducts In Attic Foam

The foam provides a vapor barrier so the ductwork won t sweat.

Insulating ac ducts in attic foam.

When we seal the attic with spray foam it s as tight as a butter tub. Compared to traditional insulation whether fiberglass or cellulose spray foam has the potential to provide better performance via its air sealing properties high r values per inch of thickness and in the case of closed cell spray foam ability to repel moisture. If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order. Spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch.

In a vented attic all of that expensive airflow is lost to the environment. Cover the spray foam with fire retardant spray. Cover the metal ductwork with closed cell spray foam. One huge benefit of the spray foam insulated attic is that conditioned air leakage from the ac furnace duct system is contained and used to condition the attic.

Many homeowners love spray foam insulation and it s easy to understand why. In 60 seconds you ll be on your way to paying lots less when you use foam it green. Oh and when you put it in your attic spray foam insulates the attic itself. Spray foam spreads fire very fast creates massive amounts of toxic smoke.

Choose foam it green spray foam insulation kits and don t settle for less than you deserve. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards that specify an r value of 8 for attic ducts and 6 for ducts located anywhere else. Consider adding more insulation as ductwork is farther from the furnace.