3 - Thermal bridges
An effective handling of thermal bridges in the EPBD context
Calculation of the thermal bridge loss coefficient and the dimensionless temperature coefficient for an example of the joint ceiling to exterior wall. The colours illustrate the temperature distribution within the construction.
© Prof. Gerd Hauser, Fraunhofer Institute for Building Physics
Thermal bridges increase the building energy demand for heating and cooling. This energy loss can even be higher than for example the energy benefit provided by thermal solar collectors for domestic hot water. The public awareness of this fact is however very low.
Therefore, the national EP calculation procedures have to include the impact of thermal bridges (as they include the effect of thermal solar collectors). Moreover, best practice examples of advanced solutions or technologies should be widely presented, in order to promote the advantages of a detailed planning of component joints in new and renovated buildings.
ASIEPI has collected and analysed the used Member States approaches for including thermal bridges in the national energy performance calculation standards. A quantification of the thermal bridge effects to the energy balance was made and information on databases on thermal bridges tools, publications and guidelines have been collected and disseminated. The gathered information was condensed into information papers, which shall give positive influence to national developments in standards etc. Moreover, the information has also been made available through databases. Innovative product developments for reducing thermal bridges have been collected and disseminated to countries where these products are still unknown or less used. It was analysed, where problems with the execution quality exist and how the construction processes can be improved.
At the end of the ASIEPI project phase (March 2010) all deliverables of the joined work by experts from 17 EU Member States and Norway in the field of thermal bridges and their consideration in national EPBD legislations are available as follows:
6 Information Papers on:
• EU Member States approaches in regulations
• Quantification of thermal bridge effects on the energy balance
• Software tools and thermal bridge atlases
• Good practice guidance
• Execution quality
• Advanced thermal bridge driven technical developments
Conference paper: At the AIVC Conference 2009 in Berlin, the paper ‘Thermal bridges in the EPBD context’, presented issues in connection with thermal bridges.
Presentation-on-demand: ‘Thermal bridges in the EBPD context: overview on MS approaches in regulations’
Information platform on thermal bridges: ‘Thermal Bridges Forum’ : A community on BUILD UP dealing especially with thermal bridges related information: Members can discuss problems and questions, specific publications, news, events, tools and blogs can be found. All ASIEPI information related to thermal bridges is available in the community.
Final report: ‘An effective Handling of Thermal Bridges in the EPBD Context - Final Report of the IEE ASIEPI Work on Thermal Bridges’. The report contains 69 pages, presents the whole work on thermal bridges within ASIEPI and includes the derived recommendations to policy makers, standardisation bodies, building practitioners, building owners, software companies and the building industry.
Summary report: ‘An effective Handling of Thermal Bridges in the EPBD Context’. This report summarises on 22 pages the results of the work on thermal bridges within the ASIEPI project and presents recommendations for different groups of audience. Additionally it lists the relevant project deliverables and informs on participants and sponsors.
Last update: 21-05-2010