HJ Cannon Group was founded in 1982 and specializes in the investigation, design, and inspection of elements associated with the Building Envelope (rooing, exterior walls, curtainwalls, etc...). Our staff includes architects, engineers, and design consultants with numerous years experience in addressing issues associated the the sytems that form the building envelope. In addition, our firm has a registered professional engineer on staff to assist in the building envelope evaluations as well as to provide general consulting services to Architects, Engineers, Contractors, and Owners. HJ Cannon Group also provide litigation support services for alleged construction defect issues. Herb Cannon, R.A. has assisted in hundreds of construction defect claims representing Developers, Contractors, and Architects.