Best Way To Insulate Ducts In Attic

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.

Best way to insulate ducts in attic.

That s what happened to the ducts in the lead photo of this article. Add additional sealant if necessary. 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. Energy saver dealers 204 202 views.

In last week s blog i discussed the practice of burying attic ducts in deep insulation since burying ducts is simply one of several ways to address the energy waste associated with the decision to locate ducts in a vented unconditioned attic it s worth taking a fresh look at all of the possible solutions to the attic duct problem. Bury the ducts deeply in insulation. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Before you insulate the ducts you need to seal the ducts.

Use a paintbrush to apply duct mastic to the joints where an elbow. How to insulate the ductwork determining the right r value. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Test total duct leakage.

It gets an assigned r value. Because the simplest and cheapest way to insulate an attic is to add material to the floor. Insulation is rated in terms of its thermal resistance. Make sure the foil surface of the insulation is free of dust before applying the tape.

But if the floor is covered in plywood you can t stuff enough insulation beneath it to do the job sufficiently not even in warm climates. Ducts are inherently leaky at. Mechanically fasten and mastic seal all duct connections. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal.

Ted also has inherited a powered attic ventilator. If necessary switch the wires to reduce the blower to its lowest. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Foil backed self adhesive foam duct 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. Like any other insulation use additional layers to provide better insulation power. Choosing the type of duct. Installs easily and wraps around irregular ductwork areas well.

How to insulate the attic air sealing the attic energy saving attic insulation duration. The duct insulation should include a vapor barrier cover. To fit your ducts simply cut the sleeve to length with a sharp pair of scissors.