Best Way To Insulate Ducts In Attic

Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal.

Best way to insulate ducts in attic. Because the simplest and cheapest way to insulate an attic is to add material to the floor. Bury the ducts deeply in insulation. Ted also has inherited a powered attic ventilator. How to insulate the ductwork determining the right r value.

Plan to pull up the flooring and layer new insulation on top of the old. Test total duct leakage. Insulation is rated in terms of its thermal resistance. Add additional sealant if necessary.

Ducts are inherently leaky at. Foil backed self adhesive foam duct insulation. It gets an assigned r value. Energy saver dealers 204 202 views.

Mechanically fasten and mastic seal all duct connections. Like any other insulation use additional layers to provide better insulation power. Check the speed of the blower motor on the furnace. Choosing the type of duct.

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. To fit your ducts simply cut the sleeve to length with a sharp pair of scissors. 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. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

If necessary switch the wires to reduce the blower to its lowest. Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Sealing before you insulate.

Use a paintbrush to apply duct mastic to the joints where an elbow. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. 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. Before you insulate the ducts you need to seal the ducts.

The duct insulation should include a vapor barrier cover. How to insulate the attic air sealing the attic energy saving attic insulation duration. That s what happened to the ducts in the lead photo of this article.