Duct Insulation In Attic

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.

Duct insulation in attic.

According to rightsuite the software we use the supply ducts have about 560 square feet of surface area and the return ducts 101 square feet. 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. Use metal flex or fiber board ducts that are insulated to code.

R 8 duct insulation 5 227 btu hour. The duct insulation should include a vapor barrier cover. Other times insulation may be on the outside. Flexible ductwork comes with different insulation r values.

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. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. 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. Air sealing your attic and ducts installing blown cellulose insulation and insulating ductwork will eliminate these problems.

Looking at the cooling side only the additional load would be. Sometimes the insulation is inside the ductwork.