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
Royal Commission into the Building and Construction Industry to a government authority'. On 29 August 2001, the Governor-General issued Commonwealth Letters Patent pursuant to "the Constitution of the Commonwealth of Australia", the and other enabling powers" appointing The Honourable Justice Terence Cole as the sole Commissioner and the commission's terms of reference. The commissioner was directed "...to inquire into certain matters relating to the building and construction industry..." Subsequent to the Royal Commission, Cole was appointed as an Officer of the Order of Australia in 2005 for "service to the judiciary, particularly judicial administration, to reform of the building and construction industry, and to the community through the