What Is a Radiant Barrier and How Is It Used?

The simple explanation is that a radiant barrier is type of reflective insulation, which means that it reflects radiant energy away from a space. Where other types of insulation, such as fiberglass batts and blown-in insulation, slow down the movement of heat through convection and conduction, the radiant barrier takes cares of stopping radiant energy—such as the sun beating down on the roof of a house.