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Looking for tips on insulating basement wall when foundation is uneven

Looking for tips on insulating basement wall when foundation is uneven


  #1  
Old 05-21-20, 11:54 AM
L
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Looking for tips on insulating basement wall when foundation is uneven

I am looking to insulate a basement wall up to R18 (or as close as possible). However this is an older home (1930s) where the previous owner finished the basement using mostly 2x2 it seems and the foundation is a bit uneven in spots (all cracks and issues have been resolved). Link to some images below:

https://imgur.com/a/y6PWyzg

Should I just replace the existing insulation and vapor barrier by the sills and above, then look into a sheet type solution that offers the best R value for the limited space and be done with it?
 
  #2  
Old 05-21-20, 03:35 PM
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Replace it with what?

If you have resolved any and all water issues then your good to just continue installing new insulation in the existing framing.

When I do similar insulation jobs, just leave openings at the top every 2-3 cavities so that you get some minimal air flow. It will allow any vapor/moisture to move from behind the wall!

Eliminates the need for the foam that is the "trend" these days!
 
  #3  
Old 05-21-20, 03:50 PM
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If I was doing it I would rip all that down and put up sheets of 3" foam (R15), then frame a 2x4 stud wall in front of it.

If you want to insulate the stud wall, you could use 2" foam.

Around here you would need to put up a drywall lid perimeter first that equals the thickness of the foam and the stud wall. (As a fireblock) Then the foam and framing goes under that.
 
 

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