How To Insulate Ac Ducts In Attic

Several manufacturers including certainteed and owens corning make fiberglass duct insulation with an integral jacket.

How to insulate ac ducts in attic. Her response was the water will evaporate from the ducts by the time i need the ac on. Check the speed of the blower motor on the furnace. Owens corning duct insulation. Cover the metal ductwork with closed cell spray foam.

Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. 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. 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. The foam provides a vapor barrier so the ductwork won t sweat.

Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation. How to insulate your central air heating ducts 1. That s what happened to the ducts in the lead photo of this article. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

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. Add additional sealant if necessary. Then air seal and insulate the attic much better incidentally she also used 1200 gallons of propane last winter. Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct.

How to insulate the attic air sealing the attic energy saving attic insulation duration. After the inspection seal your ducts keeping a few tips in mind. Bury the ducts deeply in insulation. Look for signs of air leaks at seams or joints such as streams of dust.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Start with clean dry ducts. If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order. Energy saver dealers 204 202 views.

Cover the spray foam with fire retardant spray. Make sure the foil surface of the insulation is free of dust before applying the tape. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards. Select your desired sealant or use a combination of products as appropriate.

Inspect the span of ductwork to be insulated.