42 Engineering services in the field of roofing and walls; project design feasibility studies for roof and wall systems, namely, technical project studies in the field of roof systems and wall paneling systems for building; renewable energy project services, namely, research and development in the field of photovoltaic and solar thermal systems; structural evaluations, namely, testing, analyzing and evaluating the structural properties of masonry and concrete structures; forensic engineering studies, namely, property condition assessments and property damage assessments to evaluate the cause and impact of natural and man-made disasters; graphic renderings for roof and wall systems; engineering drawing services for roof and wall systems; conducting engineering surveys featuring roof and wall design calculations, wind uplift, drainage and snow retention calculations; metal retrofit framing engineering technical project design for roofs and walls; engineering project inspection and post technical evaluations of roof and wall systems; aerial roof measurement services, namely, remote measuring services for the exterior features of homes, buildings, and roofs using aerial imagery and computer software; infrared scanning services of roof and wall systems, namely, detection of plumbing and roof leaks, and electrical wiring in the inaccessible areas of an existing structure or home, buildings and/or wall(s) and void(s) by means of infrared imaging units