There is a temperature difference between the external atmosphere and internal environment. It is a natural phenomenon where hot air which is lighter moves up and cold air replaces in its place. Heat always transfers from the warmer side to the cooler side. It is also observed that the air always flows from high pressure to areas of low‐pressure to neutralize the differences. The spot where the heat leaks is most likely where a thermal bridge exists.
There are several ways in which there is heat gain in a building and one of the major factors is thermal bridge. Almost 30% of the energy loss in building can be attributed to thermal bridging. It occurs when there is high thermal conducting material in the building construction like steel or stone, it forms a thermal bridge that allows for quicker heat transfer, where it is loss or gain.
During summer season heat from the exterior transfers to the interior and increases the cooling load. This can be prevented by avoiding thermal bridges in building design, easily taken care of in a Passivhaus. Thermal bridging must be avoided by carefully paying attention to details during design and construction.
In Passivhaus standard thermal bridge free design is essential to provide high performance building with energy efficiency and user comfort. These standards are put to test after construction. Every penny invested sees it’s worth with a Passivhaus.
3 useful links.
- How can we design a thermal bridge free building without knowing what it is? Definition and effects of thermal bridges.
- What defines a thermal bridge free design and how it improves the construction detailing substantially?
- Thermal Bridges occur in specific junctions. ‘The PH+ guide to thermal breaks’ sheds further light on it.
If you require design or consultancy on your project to avoid thermal bridges, you know how to contact us. 🙂
Posted on 5th Oct, 2020