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Old 12-16-2015, 11:07 AM   #1
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Finishing Basement - flip existing R-30 batts in ceiling?


I'm finishing my basement and have a question about the existing R-30 fiberglass batt insulation between the floor joists over head. Currently, it's paper side up (facing our finished upstairs). If I'm finishing the basement space, should I flip the batts around so the paper faces the basement living spaces?

I know it's always paper facing the warm area... but in this case... there are two warm areas. The basement needs the insulation more, I assume?

Thanks!
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Old 12-16-2015, 09:03 PM   #2
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If between two warmed areas, insulation only serves against sound transmission... leave it be or pull the facing and spread the batts in attic. The facing is to stop moisture migration, none in your case; no great temperature differences/pressure differences.

Gary
PS; you do, however, require some rim wood joist insulation, if none on exterior. Use foil-faced foamboard to stop any moisture from interior/exterior per Energy requirements; http://energycode.pnl.gov/EnergyCode...e=Pennsylvania
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Last edited by Gary in WA; 12-16-2015 at 09:07 PM. Reason: sp
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Old 12-16-2015, 09:12 PM   #3
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Thank you!
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Old 12-17-2015, 12:06 AM   #4
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You're welcome, that's why we are here. Wear protective gear if moving it...

Gary
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