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
Building and Construction Authority BCA International, a wholly owned subsidiary formed by BCA, paves the way for local construction companies to offer a full scope of expertise and value-added services to assist overseas governments and clients in developing excellent built environments. BCA also established a Construction Productivity Gallery and a Centre for Lean and Virtual Construction to guide and advise construction firms on the latest construction technologies and re-engineering processes to achieve time and labour savings. This is in line with Singapore’s national productivity drive, where BCA introduced a S$250-million Construction Productivity and Capability Fund (CPCF) in June 2010 to help the construction industry