How To Insulate Ductwork In Attic

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.

How to insulate ductwork in attic. Cover the spray foam with fire retardant spray. Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. When these ducts are exposed to exterior air the plastic jacket never gets cold enough to permit condensation because the hot attic air keeps the plastic jacket warm. Tape any punctures in the insulation s vapor barrier to prevent leaks.

The duct insulation should include a vapor barrier cover. Energy saver dealers 204 202 views. 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. Use a pressure sensitive vapor retarder tape designed for ductwork.

Bury the ducts deeply in insulation. The attic and walls are one of the most important areas to insulate in any space. Mechanically fasten and mastic seal all duct connections. Most insulation relies upon the air space between its fibers to deliver the r value promised.

It was new when the ac was put in 7 years ago. Avoid compressing the insulation. Because the simplest and cheapest way to insulate an attic is to add material to the floor. Check the speed of the blower motor on the furnace.

If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order. That s what happened to the ducts in the lead photo of this article. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Cover the metal ductwork with closed cell spray foam.

Plan to pull up the flooring and layer new insulation on top of the old. Recently i had another hvac company come out and put in a new bathroom vent and they told me they believed the duct work was full of water. I called out the original hvac company and they took a look and said they saw no water. Use metal flex or fiber board ducts that are insulated to code.

When it comes to insulation ductwork matters too. How to insulate the attic air sealing the attic energy saving attic insulation duration. The attic ductwork is flex duct work. If necessary switch the wires to reduce the blower to its lowest speed.

Use a paintbrush to apply duct mastic to the joints where an elbow connects to a duct.