Energy efficient roof?
Most people believe a roof is only a blanket of protection for a building. As the top layer and protector of your house, the roof stands up to more potentially troublesome elements than every other part of your home. It plays a bigger role than you might think. Ideally, a roof is going to have a high proportion of reflectance and a high proportion of emittance. After the roof becomes too hot, the heat enters the inside of the building.