Before revision: Characteristics Energy efficiency Minimal, if any, air leaks, which improves comfort and reduces heat loss compared to walls without a solid air barrier High thermal resistance (R-value) typically above 3 K ·m /W (in American customary units: R-17); this results in saving energy compared with uninsulated masonry (see comparison) Continuous insulation without thermal bridges or "insulation gaps", as is common in framed construction Thermal mass, when used well and combined with passive solar design, can play an important role in further reductions in energy use, especially in climates where it is common to have outside temperatures swing above inside temperatures during the day and below at night.
After revision: Characteristics Energy efficiency Minimal, if any, air leaks, which improves comfort and reduces heat loss compared to walls without a solid air barrier High thermal resistance (R-value) typically above 3 K ⋅m2 /W (in US customary units: R-17); this results in saving energy compared with uninsulated masonry (see comparison) Continuous insulation without thermal bridges or "insulation gaps", as is common in framed construction Thermal mass, when used well and combined with passive solar design, can play an important role in further reductions in energy use, especially in climates where it is common to have outside temperatures swing above inside temperatures during the day and below at night.