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 of Romania of the 13 states included from the Emerging Europe for the infrastructure business environment. The construction industry is forecast to reach a value of RON36.2 billion (US$13.41 billion) by 2011, from an estimated RON20.88 billion (US$7.43 billion) in 2006. Prior to the start of the crisis, the Romanian construction industry was one of the most vibrant in the European Union, but this changed dramatically in 2009, when construction output fell by 15%, with a similar reduction following in 2010. In 2011 Romanian construction market should finally lead to a measure of stabilisation on the market, but growth is not likely