I finally finished putting up the last batts of insulation down the middle of the shop ceiling this afternoon (yea!). However, the last pack of insulation I bought from the orange Borg was labeled "metal frame" in addition to the usual R-13, 3 1/2", 96" markings. What is the significance of that particular marking? The batts and tabs don't seem to be noticeably different from the batts I had previousl purchased.
Any insight into this would be appreciated.