Use radiant barriers in roofs

A radiant barrier reduces the transfer of heat absorbed into the building space through the roof. A radiant barrier can take the form of a reflective coating on the roof surface, a reflective film within the roof structure, or even a reflective (low-emissivityAmount of heat radiation emitted from a particular body or material. Emissivity is expressed in a fraction or ratio, with the lowest values indicating low emissivity and the highest indicating the high emissivity of flat black surfaces.) coating on the ceiling.