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.

Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. Mechanically fasten and mastic seal all duct connections. Sealing before you insulate. How to insulate the ductwork determining the right r value.

Ducts are inherently leaky at. 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. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place.

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

Choosing the type of duct. When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. Like any other insulation use additional layers to provide better insulation power. Install loose fill insulation to cover the ducts and the attic floor to meet or exceed the code required r value for attic insulation.

It gets an assigned r value. Ted also has inherited a powered attic ventilator. How to insulate the attic air sealing the attic energy saving attic insulation duration. Bury the ducts deeply in insulation.

Plan to pull up the flooring and layer new insulation on top of the old. That s what happened to the ducts in the lead photo of this article. Because the simplest and cheapest way to insulate an attic is to add material to the floor. If necessary switch the wires to reduce the blower to its lowest.

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. Add additional sealant if necessary. Use a paintbrush to apply duct mastic to the joints where an elbow. Installs easily and wraps around irregular ductwork areas well.

Before you insulate the ducts you need to seal the ducts. Energy saver dealers 204 202 views. Insulation is rated in terms of its thermal resistance.