Duct Insulation In Attic

Add additional sealant if necessary.

Duct insulation in attic.

Since burying ducts is simply one of several ways to address the energy waste associated. Attic systems can help you improve your home s efficiency and comfort with attic insulation air sealing duct work solutions radiant barriers and more. Other times insulation may be on the outside. Duct insulation solving condensation heat and cold problems insulation on ducts must protect from condensation radiant heat and cold.

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. Solutions to the attic duct problem. Mechanically fasten and mastic seal all duct connections. Repeat to insulate the remaining ducts.

Flexible ductwork comes with different insulation r values. The duct insulation should include a vapor barrier cover. One solution to cold heat and condensation you ll be warm in winter cool in summer and dry all the time. Secure the insulation with short strips of foil tape.

In last week s blog i discussed the practice of burying attic ducts in deep insulation. Use the type of. Prodex total duct insulation insulation radiant barrier vapor barrier all in one product. Wrap the insulation around the duct and then pinch the seam closed.

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 loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation. Apply a long strip of foil tape along the seam in the insulation. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct.

When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. In a vented attic this can happen when the duct is in close proximity to conditioned space i e the ceiling and also thermally isolated from the hot attic beneath the ceiling insulation. We make your home or building more comfortable in the continental us and canada. Test total duct leakage.

For an added layer of protection you can apply duct mastic to the tape and duct. In this case the temperature gradient between supply air and the ceiling can be such that the duct surface could be cooler than the local dew point. Sometimes the insulation is inside the ductwork.