All EU Member States plus Norway consider thermal bridges in the energy performance assessment of new buildings, but to a lesser extent in the assessment of existing buildings that undergo major renovation. A detailed assessment of thermal bridges allows for compensation of other energy influences due to better building junction solutions. The use of default values on the other hand makes the calculation of the energy performance faster. Several Member States have included specific requirements concerning the quality of building junctions in their regulations. These can be maximum linear thermal transmittances or minimum dimensionless temperature factors.
Some countries have a meticulous check of details during or after the design phase of a building. Few countries have a detailed quality assurance of the execution quality on the construction site. ASIEPI has collected ways to assess the execution quality, but also possible sticks and carrots to improve the realisation of building junctions.
The search for thermal bridge driven industry developments was not an easy task. However, the report contains some products that can reduce thermal bridges in buildings significantly. It has to be mentioned that most of the identified products are produced and used in central Europe. A regulation that allows the detailed assessment of building junctions and that is up-to-date with innovations, supports these kinds of solutions (see also another ASIEPI topic ‘The EPBD as support for market uptake for innovative systems’).