Our Fort Worth inspector found “grayflex”-type insulated flex duct in this 1980s Arlington home recently. The early versions of insulated flex duct were marketed too soon, because the defects didn’t show up until hundreds of thousands of feet of it were installed in attics all over the country. As you can see from the video, with attic heat and exposure to minimal amounts of UV light, it begins to shred and then fall apart.
We find it often in early 1980s homes, and we recommend our Clients consult a heating and cooling specialist, BEFORE THEY DECIDE. Take a look and see how energy-efficient you think a house would be with this installed.