Duct Insulation In Attic

The duct insulation should include a vapor barrier cover.

Duct insulation in attic.

Looking at the cooling side only the additional load would be. Attic space insufficient attic insulation poor air sealing and uninsulated ductwork are all common problems that will lead to uncomfortable rooms and make your home less efficient. Use metal flex or fiber board ducts that are insulated to code. R 8 duct insulation 5 227 btu hour.

Sometimes the insulation is inside the ductwork. When hvac ducts are installed in a vented attic in a dry climate bury the ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. All the ducts are in the attic. Other times insulation may be on the outside.

Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Air sealing your attic and ducts installing blown cellulose insulation and insulating ductwork will eliminate these problems. When hvac ducts are installed in a vented attic in any climate encapsulate the hvac ducts in attic insulation to protect them from temperature extremes in the unconditioned attic space. When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm.

Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.