GAF’s major announcement to commit $100 million to include recycled post-consumer asphalt shingle waste across all product categories is generating strong reaction industrywide. RC Editor Art Aisner continues the conversation with Tad Radzinkski, Certification Officer Of Green Circle Certified, a third-party organization that is currently evaluating the program for ‘closed-loop certification. He explains what that is and what the initiative could mean for the roofing industry and other building trades in this exclusive conversation.