Duct Insulation In Attic

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Duct insulation in attic.

Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation. Sometimes the insulation is inside the ductwork. Test total duct leakage. 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.

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. In last week s blog i discussed the practice of burying attic ducts in deep insulation. One solution to cold heat and condensation you ll be warm in winter cool in summer and dry all the time. 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. 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. Since burying ducts is simply one of several ways to address the energy waste associated. For an added layer of protection you can apply duct mastic to the tape and duct.

Because the moving air is in the ductwork for only a short period of time it does not need the insulation r value the attic floor requires. Repeat to insulate the remaining ducts. Mechanically fasten and mastic seal all duct connections. The duct insulation should include a vapor barrier cover.

Apply a long strip of foil tape along the seam in the insulation. Add additional sealant if necessary. Secure the insulation with short strips of foil tape. Wrap the insulation around the duct and then pinch the seam closed.

Use the type of. Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures. Other times insulation may be on the outside. Flexible ductwork comes with different insulation r values.

Duct insulation solving condensation heat and cold problems insulation on ducts must protect from condensation radiant heat and cold. Prodex total duct insulation insulation radiant barrier vapor barrier all in one product. Attic systems can help you improve your home s efficiency and comfort with attic insulation air sealing duct work solutions radiant barriers and more.