Can I still use polyiso to insulate a rim joist that is irregular?
I am about to jump into insulating rim joist in the my crawlspace, but as I am cutting pieces for it, I am starting to realize that foam often will not be 100% flush with wood and in some spots there will be resulting small cavity behind. Will that create a problem or is little bit of cavity behind fine, as long as I make sure all pieces of foam are foamed in just right?
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