How To Insulate Ac Ducts In Attic

Of course the seams on the duct insulation must be sealed with a high quality tape.

How to insulate ac ducts in attic.

She is also still convinced that snow is blowing in through the soffits despite my evidence that is is not and in fact can t because there are. Several manufacturers including certainteed and owens corning make fiberglass duct insulation with an integral jacket. Owens corning duct insulation. Energy saver dealers 204 202 views.

Bury the ducts deeply in insulation. You don t have to wash them but wiping them with a damp cloth or whisking them with a broom and making sure the surface is dry will help the sealant to duct bond. If using this technique in a humid or marine climate the ducts must be encapsulated with spray foam before installing the blown insulation. Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation.

After the inspection seal your ducts keeping a few tips in mind. Select your desired sealant or use a combination of products as appropriate. Inspect the span of ductwork to be insulated. How to insulate your central air heating ducts 1.

How to insulate the attic air sealing the attic energy saving attic insulation duration. This isn t equivalent to bringing them into the conditioned space as you ll still have additional duct load but it s a lot better than having them in unconditioned attic space. The foam provides a vapor barrier so the ductwork won t sweat. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Cover the metal ductwork with closed cell spray foam. Check the speed of the blower motor on the furnace. Then air seal and insulate the attic much better incidentally she also used 1200 gallons of propane last winter. If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order.

Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Make sure the foil surface of the insulation is free of dust before applying the tape. Look for signs of air leaks at seams or joints such as streams of dust.

If necessary switch the wires to reduce the blower to its lowest speed. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Add additional sealant if necessary. That s what happened to the ducts in the lead photo of this article.

Cover the spray foam with fire retardant spray.