Rim Joist Insulation Alternative
I have read articles detailing the preference for using spray foam to insulate rim joists in unfinished basements. Facing difficulty in finding someone to do this work for me, an alternative was presented to me recently. That being using about 12″ of blown-in cellulose instead. Intello or a similar product would be used as a vapor retarder.
As near as I can tell, non-spray foam alternatives fall out of favor because they are not very effective in keeping moisture from the rim joist. Although the cellulose could also come up short in this regard, would the inclusion of a smart retarder minimize or eliminate the potential for problems caused by moisture?
I suspect the spray foam will seal the rim joist area better than the cellulose. Would you agree?
Thanks in advance.
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