Michael Hensen is a professional engineer, Registered Roof Consultant (IIBEC) and District Manager of the London and Cambridge, Ont., offices of IRC Building Sciences Group. He has more than 30 years of experience providing building and engineering services for the commercial, municipal, multi-residential, educational and health-care sectors. He has served as a course instructor for roof-related continuing education courses and for more than 15 years has participated in IIBEC/RCI conference education sessions and roofing symposiums.