R-value (insulation) as ASHRAE 90.1 and the IECC prescribe U-values. However, R-value is widely used in practice to describe the thermal resistance of insulation products, layers, and most other parts of the building enclosure (walls, floors, roofs). Other areas of the world more commonly use U-value/U-factor for elements of the entire building enclosure including windows, doors, walls, roof, and ground slabs. The SI (metric) unit of R-value is whereas the I-P (inch-pound) unit is For R-values there is no difference between US customary units and imperial units, so the same I-P unit is used in both. Some sources use ″RSI″ when referring
Construction Industry Council its membership means that CIC (like a small number of other bodies, including Constructing Excellence) can speak with authority on issues connected with construction without being constrained by the self-interest of any particular sector of the industry. As representative of the views of professionals, it has a seat on the government/industry body, the Strategic Forum for Construction. The Construction Industry Council developed and operates the Design Quality Indicator (DQI) tool to measure the design quality of buildings. CICAIR Limited, a specially created wholly owned subsidiary of the CIC, is the sole body authorised to approve Approved Inspectors to undertake building