The Dependence of Mold on the Relative Humidity in Different Types of Materials

Building materials commonly used in Central Europe across the material base tend to have problems with the occurrence of mold. This is not only an aesthetic issue, but attacked material loses its properties as strength and durability and there is also a deteriorationening in other properties. This paper is focused on the susceptibility of wood and gypsum based materials to the development of mold at different humidity. There were also studied mold species occurred in samples naturally. Significantly increased the growth of mold on the surface was observed with samples placed into 98 % relative humidity than samples at 80 % relative humidity. Predominant mold was found on the surface of samples of solid wood. The most observed species was Trichoderma viride on wood based materials.