Best Way To Insulate Heating Ducts In Attic

Duct board much like the duct liner is also a fiberglass product.

Best way to insulate heating ducts in attic.

Wrap the insulation around the duct and then pinch the seam closed. Insulation is rated in terms of its thermal resistance. For an added layer of protection you can apply duct mastic to the tape and duct. 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.

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. Both can be added to uninsulated attics or layered over existing material. 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. To install preformed duct insulation start by disconnecting an elbow to expose the end of the duct.

How to insulate the ductwork. Use the type of. 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. There are a couple of steps to insulating ductwork.

Determining the right r value. Our heating and ac ducts are 100 within the thermal envelope in the floor trusses above our insulated basement. For diy attic insulation you ve got two choices. Secure the insulation with short strips of foil tape.

When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Repeat to insulate the remaining ducts. 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. The unconditioned space also houses his hvac system.

Loose fill or batt the common term for blanket insulation. Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures. If it is located in a conditioned part of the house also remember to insulate and air seal your attic access. Insulate and air seal any knee walls vertical walls with attic space directly behind them in your home as well.

In my case it is not practical to get my ducts out of the attic. Ted has more than a few cobwebs in his attic. Apply a long strip of foil tape along the seam in the insulation. It is best to work with an hvac professional who can make sure you are choosing the right insulation and installing it properly.