Radiant barrier is an innovative insulation technology. Unlike many other building materials that make up a home, radiant barriers also have a place in outer space, as NASA has used radiant barrier technology since the Apollo program. In your home, it has the same function as it does on NASA spacecraft. Like other forms of insulation, it’s designed to regulate attic temperature. The specific way it works sets it apart, though—the radiant barrier’s main function is to prevent heat flow…