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
Office of the Australian Building and Construction Commissioner of entitlements for those working in the building and construction industry. In 1997 the Australian Government put in place a National Code of Practice for the Australian building and construction industry. In order to be eligible to work on Australian Government building and construction projects businesses must be compliant with the National Code of Practice. The National Code and Guidelines encourage a culture of best practice workplace relations and the compliance to all legal obligations and ethical tendering requirements. A sham contract is where an employer deliberately disguises an employment relationship as an independent contracting arrangement, instead of engaging the