INVESTIGATIONS OF GYPSUM BOARDS WITH REGARD TO THE MOISTURE-BUFFERING-EFFECTS

It is of significant importance that heat, humidity and air contents are well balanced in buildings, as animbalance of these factors may have a decisive effect on the construction as well as on the residents, forexample damage to the building structure, decrease of thermal comfort and increase of energyconsumption. Relative humidity, generated within the construction or in the interior of a building, is ofspecial importance. In recent times there is an increase in discussion and investigation on the influenceof humidity absorbing or desorbing surface layers in rooms. The focus is the influence of differentmaterials on the fluctuation of relative humidity in case of humidity peaks. In the course of investigations,carried out at the Fraunhofer-Institute of Building Physics in Holzkirchen, the effect of the moisturebuffering effect of gypsum plaster and gypsum boards was investigated under real conditions. Thispaper intends to describe the investigations and interpret the results.