Roofing and wall system consultation; repair, maintenance and installation of roof and wall systems; roofing and wall installation and repair; roofing and wall consultation, namely, evaluating the roofing and building wall needs of others and determining the appropriate wall system and roofing system in response to the analysis; roofing and wall installation and maintenance; roof and wall maintenance consulting services featuring construction details, photographic documentation, architectural drawings, visual observation notes; roof and wall replacement consulting, featuring a comparative analysis of roofing and wall solutions based on application-specific concerns and requirements; installation services for roofing and wall systems for buildings and related components to the custom design and specification of others; engineering services in the field of roofing and walls; project design feasibility studies for roof and wall systems; renewable energy project services such as photovoltaic and solar thermal systems; budget assistance and value engineering services for roofing and walls, including return on investment (ROI) analysis and life-cycle cost analysis; building envelope energy savings analysis; structural evaluations; forensic engineering studies; graphic renderings for roof and wall systems; engineer signed and sealed manufacturer's shop drawings for roof and wall systems; engineer signed and sealed roof and wall design calculations including, wind uplift, drainage and snow retention calculations; metal retrofit framing project design for roofs and walls; project inspection and post evaluations of roof and wall systems; aerial roof measurement services; infrared scanning services of roof and wall systems