Sustainable roofing systems can be many things, but primarily they are assemblies that provide a covering protecting a building from the elements (i.e., water, sun, cold, and heat) while minimizing their burden on the environment and conserving energy.
The Asphalt Roofing Manufacturers Association (ARMA) has updated the Modified Bitumen Design Guide, a valuable resource for building owners and roofing professionals working with asphaltic roofing systems.