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  1. #1
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    Mar 2007
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    Chicago, IL
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    Default Vapor retarders and insualtion at the interior of cold-climate single wythe CMU walls

    Does anyone have a link to a discussion of best practices / standards for vapor retarders and insulation at the interior of single wythe CMU walls in general, and split face block in particular?

    Thanks

    Similar Threads:
    NHIE Practice Exam
    Michael Thomas
    Paragon Property Services Inc., Chicago IL
    http://paragoninspects.com

  2. #2
    Join Date
    Jul 2007
    Location
    Chicago
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    187

    Default Re: Vapor retarders and insualtion at the interior of cold-climate single wythe CMU w

    Michael,

    Did you find anything since this post? I have a few things regarding vapor retarders/barriers but none of them point exactly to our little dilemma in Chicago. By and large they are not a good idea, no matter how one interprets our cold/mixed climate.


  3. #3
    Join Date
    Mar 2007
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    Chicago, IL
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    Default Re: Vapor retarders and insualtion at the interior of cold-climate single wythe CMU w

    I've not been able to find any objective studies of this problem, just a lot of (conflicting) opinion.

    Michael Thomas
    Paragon Property Services Inc., Chicago IL
    http://paragoninspects.com

  4. #4
    Join Date
    Jun 2008
    Location
    Stacy, MN
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    145

    Default Re: Vapor retarders and insualtion at the interior of cold-climate single wythe CMU w

    The State of Minnesota did a study on the issue, here is a link to it:
    Energy conservation - CCLD
    Look at the technical opinions.
    The state rewrote the energy code after the study was done.


  5. #5
    Join Date
    Mar 2007
    Location
    Chicago, IL
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    Default Re: Vapor retarders and insualtion at the interior of cold-climate single wythe CMU w

    I'm not finding single-wyeth CMU walls in that study, just stud walls:

    http://www.dli.mn.gov/CCLD/PDF/bc_gi513_activity3.pdf

    Michael Thomas
    Paragon Property Services Inc., Chicago IL
    http://paragoninspects.com

  6. #6
    Join Date
    Jun 2008
    Location
    Stacy, MN
    Posts
    145

    Default Re: Vapor retarders and insualtion at the interior of cold-climate single wythe CMU w

    Sorry, hadn't looked at it in awhile and thought that was the one. (They did another study, but I can't find it anymore)
    This link will take you to the Builders Association of Minnesota which has a Field Guide on how to comply with the Minnesota Building Code, the foundation insulation provisions are new, and were done to address moisture being trapped in the interior foundation insulation.
    Although still allowed, practically no one is framing stud walls on the interior with fiberglass insulation batts anymore here.


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