Best Way To Insulate Ducts In Attic

When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Best way to insulate ducts in attic.

To fit your ducts simply cut the sleeve to length with a sharp pair of scissors. 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. Because the simplest and cheapest way to insulate an attic is to add material to the floor. 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.

Plan to pull up the flooring and layer new insulation on top of the old. Installs easily and wraps around irregular ductwork areas well. How to insulate the attic air sealing the attic energy saving attic insulation duration. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct.

Energy saver dealers 204 202 views. If necessary switch the wires to reduce the blower to its lowest. Ducts are inherently leaky at. Sealing before you insulate.

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. Test total duct leakage. How to insulate the ductwork determining the right r value. Ted also has inherited a powered attic ventilator.

Bury the ducts deeply in insulation. Mechanically fasten and mastic seal all duct connections. It gets an assigned r value. That s what happened to the ducts in the lead photo of this article.

Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation. Foil backed self adhesive foam duct insulation. Before you insulate the ducts you need to seal the ducts. Add additional sealant if necessary.

Choosing the type of duct. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Insulation is rated in terms of its thermal resistance. 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.

Check the speed of the blower motor on the furnace. Although both the attic floor and the ductwork are insulated ted recognizes the situation isn t ideal. Make sure the foil surface of the insulation is free of dust before applying the tape.