Ductwork In Attic How To Insulate

Consider adding more insulation as ductwork is farther from the furnace.

Ductwork in attic how to insulate.

Avoid compressing the insulation. I called out the original hvac company and they took a look and said they saw no water. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Most insulation relies upon the air space between its fibers to deliver the r value promised.

The duct insulation should include a vapor barrier cover. If your rigid metal ductwork has any insulation it may already have enough. Look for signs of air leaks at seams or joints such as streams of dust. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value.

Energy saver dealers 204 202 views. Inspect the span of ductwork to be insulated. If you want to cover metal ductwork with blown in insulation t hese steps must be followed in this order. Tape any punctures in the insulation s vapor barrier to prevent leaks.

Check the speed of the blower motor on the furnace. Use metal flex or fiber board ducts that are insulated to code. 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.

Use a paintbrush to apply duct mastic to the joints where an elbow. Install ductwork so that it is in direct contact with i e laying on the ceiling and or truss lower cords. Mechanically fasten and mastic seal all duct connections. Make sure the foil surface of the insulation is free of dust before applying the tape.

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. If necessary switch the wires to reduce the blower to its lowest. How to insulate your central air heating ducts 1. 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.

Use a pressure sensitive vapor retarder tape designed for ductwork. If it s uninsulated you should insulated it to at least r 4 to r 8 for dfw. Purchase duct wrap insulation that complies with the 2009 international energy conservation code iecc standards. 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.