Überlegungen zum hygrothermischen Verhalten von Außenwänden im Holztafel-/Holzrahmenbau mit direkt beschichteten Beplankungen

To observe the hygrothermal behavior of exterior walls in timber frame construction with direct rendered sheathings.

The presented paper shows that it is possible to calculate with the program WUFI 4.0 the hygrothermal measurement data of weathering tests in the climate chamber on exterior walls in timber frame construction with direct rendered sheathings. Afterwards, hygrothermal calculations of walls under the use of climate data from Holzkirchen/Germany were conducted. The obtained relative humidity time diagrams and temperature time diagrams were used as input values in WUFI-BIO 2.0 to calculate the risk of mould growth in the construction. In general, the risk of mould growth in the construction could not be excluded with the calculations. Therefore, the use of interior vapor barrier sheets with s_d≥ 25 m is recommended. Further research should take place on real buildings.