Wayne Visbeen is representing Visbeen Architects and GAF Materials Corporation at this year's Greenbuild International Conference & Expo in San Francisco. Greenbuild is the world's largest conference and expo dedicated to green building with educational seminars, renowned speakers, green building tours and networking events. Wayne is manning GAF's booth as an expert in their green roofing options and will be sketching there LIVE from 10am-3pm PST today! Check out a few photos of Wayne at the conference (courtesy of GAF's facebook page).