Cellulose batts; experience with?
I just found these, and my curiosity is piqued. Anyone have any experience w/ them? I'm curious about how they are for general fit (tight? gappy?) and how they are for cutting around oddities. I am really leaning hard toward cellulose now, the more I read here and elsewhere. Batts, blown-in, or some combination thereof, depending on costs and what you get out of it. thanks. j
Asked by Anonymous
Posted Mon, 03/08/2010 - 01:38
Edited Tue, 03/09/2010 - 07:17
Posted Mon, 03/08/2010 - 01:38
Edited Tue, 03/09/2010 - 07:17
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I've never worked with Cell batts, but to me they have the same drawback as FG batts (or any type of batts) - they are a uniform shape that is expected to fit a potentially non-uniform stud bay. That said, a "flash and batt" approach would still work great.
Posted Mon, 03/08/2010 - 09:34
Yes. Cell batts may just be more batts, but if they are more uniform than 'glass (in the few houses I've installed them in, too frequently you get a very compressed batt) and cut a tad wide, the gaposis problem could be minimized. One of the rock wool ads (FWIW) mentioned something about "special sides" made just for cavity irregularities. Dunno. I think, thermally, blown-in is tops; it always gets back to the cost vs pay back time. I am also wondering about a comment in a Cell Insul Manufact Assoc bulletin; R-value is 3.8 over a wide range of densities. If so, then a DIY blown-in wall may only have the drawback that it settles a little bit. In 3 or 5 yrs, go back in and blow in a tad more (assuming an open-cavity wall.) Simple.
Posted Mon, 03/08/2010 - 14:25