Although we sometimes discuss roofing as though surface reflectivity is the only consideration, in reality it’s just one element in the overall design. Roof reflectivity can have a significant impact on a building’s energy efficiency, so making the proper roofing selection is important. Several key energy-related factors are often overlooked, however.
The first of these factors is electrical demand charge. Demand is a kilowatt measurement of the highest usage of electricity in any single 15- (or sometimes 5-) minute period during a monthly billing cycle.