Faced or unfaced insulation


  #1  
Old 03-31-23, 11:58 AM
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Faced or unfaced insulation

I have a finished basement. One room has to be done over because of a water leak. I wasn't here when they tore out the wall and insulation. For the basement wall do I use faced or unfaced insulation? There is foam on the wall itself right now so I'm asking about between the studs. Also, there is faced insulation in the ceiling. I read conflicting articles on this. Faced or unfaced on walls and ceiling? I live in Colorado which has low humidity.
 
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Old 03-31-23, 01:27 PM
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For interior walls you don't need to use faced insulation.
I've always used at least Kraft paper backed insulation as it makes the installation cleaner and neater.
I hate insulating.

With outside wall you need to consider a vapor barrier.
 
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Old 03-31-23, 04:39 PM
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Current opinion is that you do not use a vapor barrier on fiberglass insulation in exterior walls when those walls are below grade.

See IRC R702.7(2)
 

Last edited by XSleeper; 03-31-23 at 04:49 PM.
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Old 04-01-23, 09:04 PM
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I'm with X on no vapor barrier below ground. Since the paper is a vapor retarder, I would skip it.
 
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Old 04-01-23, 10:01 PM
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I would suggest you consider mineral wool over fiberglass. It fits snug and will stay in place.
How thick is the foam that is currently there?
Bud
 
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Old 04-02-23, 06:00 AM
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Properly sized unfaced fiberglass will stay in place between the studs. I find unfaced easier to install, if a vapor barrier is needed/required, then use plastic sheeting.
 
 

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