Is Adding More Joist Space Worth It To Add More Insulation?
I am planning on replacing very old fiberglass batts with mineral wool batts and the joist spaces are 8" deep.
Is it worth it to add 2' more to these spaces in order to increase the amount of insulation I can put in there?
I have read that after a point, the amount of insulation added has diminishing returns. Also, if this is ad-
visable, what is the best way to go about doing this? Thanks