Join Date: Dec 1999
Location: Birmingham, MI USA
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Due to space limitations, I'm framing the foundation wall (cinder block) of my basement with 2x2's. (The other 3 walls are interior walls and will be 2x6 staggered stud construction.) I'm trying to figure out the best way to insulate this shallow wall. The way I see it, I have 3 options:
1. Use regular 3 1/2" batts, and just compress them in the joint cavity. Under normal circumstances, this is an installation no-no, since it will reduce the R-value of the batts I use.
2. Use regular 3 1/2" batts, but peel away roughly half of their thickness to accomodate the shallow wall space. Again, this will obviously reduce the R-value.
3. Go with blown-in cellulose. Somewhat more of a PITA (have to rent the machine etc.), but I'll have just the right thickness for the wall.
I'm wondering if any of the three alternatives are better/worse than the others, or if I'm just going to wind up with the same R-value at the end of the day.