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Old 12-31-2012, 07:29 PM   #1
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insulating basement ceiling

I want to insulate my unfinished basement ceiling for the purpose of keeping my main room above floor warmer do i use faced or unfaced insulation if faced does the paper go toward the upstairs or face the basement also i live in illinois what r value and do i have to use one that specifically says ceiling?


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Old 12-31-2012, 09:12 PM   #2
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No need to insulated between conditioned spaces.

Spend the money on more aptly insulating the basement walls and air sealing.

Insulation between conditioned spaces is only to help abate noise.


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Old 12-31-2012, 10:37 PM   #3
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Also do not forget about air sealing around outlet boxes, windows, doors, attic hatches. Those are the largest heat & cooling loss culprits out there. Only time I would insulate the underside of a floor, is if it was over a crawlspace that is non-conditioned.
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Old 12-31-2012, 10:42 PM   #4
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Treating the basement as unconditioned per code, find your zone here;

Insulation for floors- per zone, here;

Vapor retarder goes toward the warm side- up. If the basement is dry/drafty, you could cover the f.g. with a housewrap on the joist bottoms to stop air infiltration from degrading its R-value, treating it more like a crawl space;
Keep in mind you may create problems with the plumbing/ducting uninsulated and colder without the heat loss from above warming them as it does now...

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