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 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