How To Insulate Ductwork In Attic

Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords.

How to insulate ductwork in attic.

I called out the original hvac company and they took a look and said they saw no water. The foam provides a vapor barrier so the ductwork won t sweat. 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. Mechanically fasten and mastic seal all duct connections.

It was new when the ac was put in 7 years ago. The duct insulation should include a vapor barrier cover. Use a pressure sensitive vapor retarder tape designed for ductwork. Plan to pull up the flooring and layer new insulation on top of the old.

Because the simplest and cheapest way to insulate an attic is to add material to the floor. If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order. 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. If necessary switch the wires to reduce the blower to its lowest speed.

Check the speed of the blower motor on the furnace. Cover the spray foam with fire retardant spray. When it comes to insulation ductwork matters too. Use metal flex or fiber board ducts that are insulated to code.

But what about the parts behind the walls and in the ceiling. Cover the metal ductwork with closed cell spray foam. 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. Energy saver dealers 204 202 views.

The attic and walls are one of the most important areas to insulate in any space. The attic ductwork is flex duct work. Bury the ducts deeply in insulation. Avoid compressing the insulation.

Press a continuous strip of foil tape to all longitudinal seams along straight runs of duct. 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. Most attic ducts are insulated flex ducts that is flex ducts with r 6 or r 8 fiberglass insulation along with an exterior polyethylene jacket. Tape any punctures in the insulation s vapor barrier to prevent leaks.

How to insulate the attic air sealing the attic energy saving attic insulation duration.