Hi,

I’m renovating a home in climate zone 6B. We are recycling as much building material as possible. The exterior walls are 2×4 with 2″ mineral wool batts. I have a lot of 3″ fiberglass batts from the ceilings that we removed. Is it okay to compress the 3″ fiberglass and 2″ mineral wool into the 2×4 stud bay? I know compression is okay but I don’t know if the double kraft paper has an adverse effect.

这个计划是将面临eps或iso (1 - 2″) with seams taped as the inner wall air barrier. Then frame a 2×3 or 2×4 wall with batt insulation as the interior wall.

Thanks,