Spandrel Panel Can Be Fun For Everyone miss debridging or "t-in-a box"). A true thermal break is 1/4 "thick minimum as well as can be approximately 1" or much more, with the polyester reinforced nylon selection. Some drape wall surface systems integrate separators that are much less than 1/4 ", http://glazing-units-with-integr18505.howeweb.com/128036/the-basic-principles-of-spandrel-insulation