Or copy this URL:
https://www.metalroofing.com/spirit/comment/9828/find/
Since it sounds like the roof is already installed, you will need to install insulation from below the roof surface. If your garage is a metal building, you can fasten metal strapping to the bottom of the purlins at 2' on center and install vinyl backed fiberglass insulation between the purlins. I would use an insulation with a foil radiant barrier backing. This system will not be as good as one installed during the roof installation because you are going to have a thermal break at each purlin. There are commercially installed systems that will insulate the purlins too. If you are interested in one of these,do an internet search for metal building insulation and look for retrofit applications.
7/13/2007
7/13/2007
NCI Building Systems, Inc.
7/16/2007