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--- basics:building_physics_-_basics:thermal_bridges:thermal_bridge_definition [2022/07/30 14:49] – [Effect on the building structure] wfeist
+++ basics:building_physics_-_basics:thermal_bridges:thermal_bridge_definition [2022/07/30 14:50] (current) – [Effect on the building structure] wfeist
@@ Line 82: / Line 82: @@
 The resulting condensation can penetrate further inside the construction due to the capillary action of the building materials, and the thermal conductivity may increase and thus the building component may almost be saturated. It will not be possible to avoid moisture damage to the building structure and mould growth may occur. However, large-scale damage is generally associated with errors in the planning, implementation and utilisation of buildings and is not a problem that is solely related to thermal bridges. These are only the points where the problems originate in the first place. Nonetheless, the risk of mould fungus to the inner surface of thermal bridges and the resultant toxic effect on occupants must be considered separately, especially since mould growth already occurs at a temperature higher than the dewpoint temperature without condensation being present. For a building physical analysis of the model, formation of mould can be assumed if relative surface humidity levels of 80 % prevail for a duration of 12 h/d   (Technical Report 4108-8).
-In constructions suitable for passive house or EnerPHit-design, thermal bridges with such catastrophic consequnces are generally avoided; we won't allow for such bad design in the recommended constructions, so we won't have that. While there can still be thermal bridges with some remaining heat losses((which have to be accounted for)), such massive temperature drops can always be avoided. A big part in avoiding catastrophic thermal bridges is the improved insulation already of the regular components. This leads to a generally higher level of indoor surface temperatures to begin with, already reducing the risk. Internal insulation, however, is a special case in which there are even more stringent rules "how to avoid thermal bridges of the catastrophic type".
+In constructions suitable for passive house or EnerPHit-design, thermal bridges with such catastrophic consequences are generally avoided; we won't allow for such bad design in the recommended constructions, so we won't have that. While there can still be thermal bridges with some remaining heat losses((which have to be accounted for)), such massive temperature drops can always be avoided. A big part in avoiding catastrophic thermal bridges is the improved insulation level already for the regular components. This leads to a generally higher level of indoor surface temperatures to begin with, already reducing the risk. Internal insulation, however, is a special case in which there are even more stringent rules "how to avoid thermal bridges of the catastrophic type".