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beattie 09-16-2012 04:37 PM

rim joist insulation
is the builder of my house required by code to insulate my rim joists

joecaption 09-16-2012 09:35 PM

You did not add where you live in your profile.
It's always best to give your local code office a call with a question like this.
It's not required in my area.

Gary in WA 09-16-2012 10:58 PM

If in the U.S. you probably are required to air seal AND insulate the rims. The "I" Codes require it; eg. #11;

5th down;

Even Joe's State requires it; IECC 2009;

#11 again:

5th down again:
Either caulking or canned foam to air seal, wall (usually) thickness insulation on rim. Always check with local AHJ.


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