Ten questions concerning sustainable domestic thermal retrofit policy research

Measuring thermal performance in steady-state conditions at each stage of a full fabric retrofit to a solid wall dwelling

“…The target retrofit U-value for elements which were thermally upgraded (rather than replaced) were calculated using Equation 4. The additional R-value provided by the retrofit materials was calculated in accordance with ISO 6946 (BSI, 2007 32 ) using values for λ and material thicknesses provided by the manufacturers' product datasheets.…”

“…Pre-1919 homes are ripe to yield the aforementioned gains as they comprise 21% of England's housing stock and have the lowest average energy performance rating (DCLG, 2017 2 ). However, these homes typically have solid wall construction (Everett, 2007 3 ) and it is not currently considered economically viable to the apply solid wall insulation required to make them energy efficient (Galvin and Sunikka-Blank, 2017 4 ).…”

“…Replacement glazing excluded from this analysis as the effect of the window frame would have to be calculated for each window 3. Budgetary constraints prevented the calculation of the total heat loss from thermal bridging at junctions to include in the disaggregate method calculation 4. The U-value reduction for each thermal element was multiplied by its internal surface area.…”

Energy-Efficient Window Retrofit for High-Rise Residential Buildings in Different Climatic Zones of China

“…To meet the ambitious emission reduction target, building owners and occupants should be encouraged to adopt suitable retrofit measures to reduce the energy consumption of buildings [21]. Hence, window retrofitting can be an important measure for reducing the energy consumption of buildings in order to achieve the targets.…”

“…In order to reach this target, the government has emphasized the importance of retrofitting residential buildings for energy conservation and has made some efforts to upgrade them in recent years [19,20]. While high-rise residential buildings account for a large proportion of the building stock and due to the need to adopt energy-efficient design and materials for this type of building, introducing sustainable retrofit to high-rise residential building should therefore help reduce the energy consumption and hence achieve the emission reduction targets of a country or city [21].…”