Best Way To Insulate Heating Ducts In Attic

When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Best way to insulate heating ducts in attic.

In my case it is not practical to get my ducts out of the attic. It is best to work with an hvac professional who can make sure you are choosing the right insulation and installing it properly. Wrap the insulation around the duct and then pinch the seam closed. Before insulating seal any air leaks and make roof and other necessary repairs.

How to insulate the ductwork. Duct liner isn t generally a diy installation and if your ducts already have liner you don t need to insulate the exterior. Apply a long strip of foil tape along the seam in the insulation. Duct board much like the duct liner is also a fiberglass product.

Repeat to insulate the remaining ducts. Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures. Determining the right r value. There are a couple of steps to insulating ductwork.

Both can be added to uninsulated attics or layered over existing material. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Our heating and ac ducts are 100 within the thermal envelope in the floor trusses above our insulated basement. 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.

Ted has more than a few cobwebs in his attic. 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. For an added layer of protection you can apply duct mastic to the tape and duct. The unconditioned space also houses his hvac system.

Use the type of. Secure the insulation with short strips of foil tape. 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. Loose fill or batt the common term for blanket insulation.

If it is located in a conditioned part of the house also remember to insulate and air seal your attic access. Made from 1 to 2 inch thick sheets of rigid glass fiber and coated with an aluminum laminate for a moisture air barrier duct board comes in. Insulate and air seal any knee walls vertical walls with attic space directly behind them in your home as well. For diy attic insulation you ve got two choices.