R-value (insulation) contain no trapped CFCs or HFCs (e.g., half-pound low density foams). On certain brands, twenty-year tests have shown no shrinkage or reduction in insulating value. This has led to controversy as how to rate the insulation of these products. Many manufacturers will rate the R-value at the time of manufacture; critics argue that a more fair assessment would be its settled value. The foam industry adopted the LTTR (Long-Term Thermal Resistance) method, which rates the R-value based on a 15-year weighted average. However, the LTTR effectively provides only an eight-year aged R-value, short in the scale of a building that
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