Installing ultraplytpo over existing built-up 50 sq ft roof for commerical building. Your project may need to comply with cool roof requirements based on the 2008 building energy efficiency standards. Products required to comply must be labeled by the cool roof rating council (crrc), listed in the crrcs rated product directory (www. Coolroofs. Org), and tested for solar reflectance and thermal emittance. Your building inspector will check for compliance at inspection.