Posted 2/28/2012 09:13 (#2256636 - in reply to #2256322) Subject: Re: OK....this idea today on shop/office building insulation
So if 2" has an "effective" R value of 24 would 3" be 36??? I'm just guessing but I bet since there are no seams and no cracks R value would change (real vs effective)I don't know