From the vault:  "What is the best material to use for that? “The one installed right”. There are many ways to develop continuity of the air barrier, and there are different approaches to success. In developing details for a build, I look at what are we using? And can I get it to do something else? In the case of drywall, we typically use it as an interior finish on the ceiling. With the investment already had, why not use it as the interior air barrier at the ceiling? Join Big Red and I as we walk thru the details of how we make that happen…….Enjoy my friends!!" Check out Steve’s Website:  http://www.stevenbaczekarchitect.com/info/ Follow Steve on Instagram:  https://www.instagram.com/stevenbaczekarchitect/?hl=en