It is a well-known fact that thermal bridges can increase the transmission heat loss of buildings significantly, especially as we move towards higher and higher insulation levels in both our new and existing buildings. Thermal bridges have been the focus of many studies in Europe over the last decades and today we have at our disposal highly developed calculation tools along with thermal bridge atlases for assessing their effect. This presents an opportunity to minimise thermal bridge effects during the design phase of a building project; however, in the transition from theory to practice there is a risk of introducing thermal bridges due to faulty execution.
A study was set up to quantify the effect of thermal bridges due to faulty execution. The study encompasses two different analyses: 1) a survey among the participating Member States concerning previous individual national studies on the influence of execution quality and 2) a questionnaire containing questions pertaining to methods for assessing and stimulating execution quality, i.e. an attempt to quantify what affects the execution quality.