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Purpose of the work
A scientific paper at the Bauhaus University Weimar investigated the possibilities and limits of thermography when using it for qualitative and quantitative evaluations of thermal bridges. The purpose of the study was to demonstrate the added value of such evaluations.
Method of approach
In our experimental set-up different thermal bridges at different types of real walls (old buildings with brick walls, new buildings with brick walls, timber buildings) and their dynamic behavior were subjected to "permanent thermography" over the course of several months. We conducted contact measurements and compared them with our thermographic results.
Content of the contribution
Thermographic images are frequently used in the field to locate inhomogeneities in building envelopes. Especially when analyzing neighborhoods and using the methods described above, quantitative evaluations will play a stronger role and will complement qualitative findings such as leaks and thermal bridges that have been detected and their comparative evaluation. Quantitative evaluations, however, are not that easy, since the component temperatures in the building stock are constantly changing due to dynamic boundary conditions such as indoor and outdoor temperatures. In our experimental set-up, various thermal bridges and their dynamic behavior were subjected to "permanent thermography". We then evaluated these findings in order to derive theories regarding the possibilities and limits of the measuring method.
Results and assessment of their significance
I will present the findings of the long-term trial and assess them in terms of qualitative and quantitative criteria. I will also compare the thermographic results with the results derived from contact measurements.
Conclusions
Qualitative criteria can usually be established with short-term tests, quantitative findings require long-term testing and have to take the selected test date into account. Reasonable measurement results can be expected when taking the dynamic parameters into account.
For further information please contact Ben Standecker at: info@ib-standecker.de