I'm doing a small Reno on my unfinished basement, I had a bunch of left over 5.5 inch r22 insulation that I am going to stick in the joist spaces. The joists themselves are 2x12.
My question is does it matter where the insulation sits in the joist space, as in can it be pushed all the way against the subfloor, or should it be flush with the bottom of the joists? There will be a vapor barrier as well enclosing the basement.
The insulation is to dampen the sound and protect against heat exchange from one floor to another.
Thanks for your help