Best Way To Insulate Heating Ducts In Attic

Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures.

Best way to insulate heating ducts in attic.

Ted has more than a few cobwebs in his attic. Secure the insulation with short strips of foil tape. If it is located in a conditioned part of the house also remember to insulate and air seal your attic access. The unconditioned space also houses his hvac system.

Before insulating seal any air leaks and make roof and other necessary repairs. Use the type of. In my case it is not practical to get my ducts out of the attic. But our erv ducts stand alone system not tied in w heat pump and 2 jumper ducts for pressure balancing from bedrooms are suspended above the insulation in our vented attic.

For diy attic insulation you ve got two choices. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct. There are a couple of steps to insulating ductwork. Duct board much like the duct liner is also a fiberglass product.

It is best to work with an hvac professional who can make sure you are choosing the right insulation and installing it properly. Loose fill or batt the common term for blanket insulation. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Determining the right r value. Wrap the insulation around the duct and then pinch the seam closed. Insulate and air seal any knee walls vertical walls with attic space directly behind them in your home as well. Our heating and ac ducts are 100 within the thermal envelope in the floor trusses above our insulated basement.

How to insulate the ductwork. Repeat to insulate the remaining ducts. Insulation is rated in terms of its thermal resistance. Apply a long strip of foil tape along the seam in the insulation.

The reflective roof already relieves a considerable heat load off the existing ducts so air sealing and better insulation will be icing on the cake for them. For an added layer of protection you can apply duct mastic to the tape and duct. My next effort with those ducts is to air seal them the best i can and replace the 56 year old insulation with r6 or better. The 1 800 square foot brick ranch in climate zone 4 dates from the 1960s but the previous owner installed both a furnace and ductwork in the attic just four years ago.