Add Insulation To Attic Ducts

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Add insulation to attic ducts.

When insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. If your rigid metal ductwork has any insulation it may already have enough. If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. In more cases than not a 3 ton ac with the ducts in the attic has a ton or so of load that s just from the location of the ducts in the attic and the associated duct gains leakage etc.

The pros charge 1 500 to 2 000 to do a 1 200 sq ft. If you want to cover metal ductwork. How much does attic insulation cost. Add additional sealant if necessary.

The cost and effort to add more insulation is minimal. You need insulation even around your ducts no matter where you live. The problem with uninsulated ducts. Pull down stair or ladder.

You can do it yourself for about 500. For an added layer of protection you can apply duct mastic to the tape and duct. Test total duct leakage. If your attic has enough insulation and proper air sealing and your home still feels drafty and cold in the winter or too warm in the summer chances are you need to add insulation to the exterior walls.

Learn more about this important step here. Check with your installer or manufacturer s website or bags to find the recommended depth 2. When it comes to adding duct insulation your monthly savings in utility bills will soon cover the costs especially if you install the insulation yourself. Consider adding more insulation as ductwork is farther from the furnace.

Properly prepare the attic before adding insulation. Attic hatch or door. Then check on the recommended depth for the cellulose insulation planned for the attic. Blown in insulation overview.

The duct insulation should include a vapor barrier cover. Use the type of. Insulation isn t only about keeping heat in. Measure the depth up to the top of the ducts.

In this case the temperature gradient between supply air and the ceiling can be such that the duct surface could be cooler than the local dew point. Affix rigid foam insulation to the attic side of the hatch or door. The remaining 2 tons of capacity is at least 1 5x oversized for the actual 1 load. This is more expensive and usually requires a contractor but it may be worth the cost especially if you live in a very cold climate.

Don t use standard cloth duct tape on hvac ductwork since the adhesive won t hold up to extreme temperatures. Mechanically fasten and mastic seal all duct connections. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.