Every industry has a cycle of innovation. Trends come and go as companies compete to improve products; some move the needle, and some don’t. Every once in a while, a product changes the game and resets standards. These innovations aren’t always as dramatic as Levi Strauss creating blue jeans or Henry Ford conceiving the assembly line, but they’re easy to find by one measure: longevity. Some innovations have sticking power because they just work, and polyiso insulation falls into that category.