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On behalf of the Department of Energy and Climate Change, research consultancy BRE has carried out in-situ measurements of wall U-values in approximately 300 domestic dwellings in England, together with more detailed investigations in a subsample of those walls.
In addition, laboratory tests have been carried out in order to validate the method of measuring U-values.
The research is important in order to understand how the walls of homes in the UK are performing in-situ in order to provide realistic estimates of current energy consumption, and to quantify the potential for energy efficiency improvements such as wall insulation.