insulating a hightop in a van

Hey ! I am looking to insulate the hightop in my Syncro vanagon. Prodex was recommended, but i’m not sure that’s good to use.? Any suggestions would be much appreciated… Hey ! I am looking to insulate the hightop in my Syncro vanagon. Prodex was recommended, but i’m not sure that’s good to use.? Any suggestions would be much appreciated…Read MoreGreenBuildingAdvisor