Interaction of humans and the environment, is subject to the occurrence of mold in residential buildings. Mold development has been the ultimate result of a variety of phenomena, processes and causes that have penetrated in various stages of preparation, implementation and operation of buildings. The negative effects which the mold in a residential area buildings exhibit is primarily a reduction in the use of comfort living space in the form of health risks in the form of allergic reactions and possibly causing chronic problems. Chronic problems over time can lead to serious illness. A big role in the occurrence of mold also plays a reduction of aesthetic values of residential spaces requiring repair and remedy these deficiencies. When removing adverse events leads to an unnecessary additional environmental burden. Problems of fungi in ground buildings are very expansive and interdisciplinary problems, which incorporates structural, termomechanic, chemical and biologic aspects. In this undergraduate work I concentrated on the origin of fungi in ground buildings with inorganic materials and I am discribing at least some important sources and aspects of fungi origin in each phases origin and exploitation building, with usage of specialised literature. Model compultations and examples of origin fungi are performed. Autocephalous origin of fungi in residencial buildings is yet fallback situation, which can be possibly prevented. But due to conditions for origin fugi can begin long ago this fallback situation. Store of bias each phases living buildings is accentuated on possibly fugi production in buildings from project up to operation.