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Old 11-07-2012, 11:14 AM   #1
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Insulating Ductwork?


I'm considering wrapping the duct work with insulation. The ductwork is in the unfinished basement of a 20 year old two-story house. The basement is a walk-out so about 1/3 of the walls are framed and insulated with r-11 fiberglass batt insulation with the rest of the walls being the concrete foundation walls. There is no drywall covering the framed walls-just the insulation. I don't think it's very air tight, althought there are no obvious drafts.
We keep the ductwork vents in the basement closed in an effort to direct more of the heat upstairs to the main living areas.--The furnace is only about 6 years old and is inspected annually. The heat we get coming out of the registers in the main living areas, however, is only slightly warm to almost cool, especially in the upper 2nd story. The upper 2 story living area is 2700 sq feet and the basement is 1500 sq feet
Would wrapping the basement ductwork improve things significantly to offset the expense of doing it?
Would keeping the vents in the basement open help to keep the ductwork a little warmer to the touch, even if the basement is not as airtight as upstairs?
Any suggestions from all would be appreciated. Thanks.

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Old 11-07-2012, 12:17 PM   #2
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Insulating Ductwork?


You are better to keep the vents open in the basement, to help keep the whole structure warmer. Wrapping the ducts in an unfinished basement is not going to do anything.

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Old 11-07-2012, 12:24 PM   #3
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Insulating Ductwork?


I would take the time to check every seam for leaks.
Make sure foil tape or mastic was used not duct tape.
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