The GAF Certified Green Roofer (CGR) program recognizes professional roofing contractors for a variety of sustainable business practices, including asphalt
shingle recycling. The program has been a big success, in part, due to contractors’ efforts in educating homeowners on roof sustainability. More than 250 professional roofing contractors have signed up since the inception of the program in Jan. 2011, and more join the program every day.