The paper presents the results of the study of the effectiveness of the effect of some disinfectants on mold mushrooms-destructors of building materials, previously found on the surface of walls and floors of livestock complexes and farms, namely: Aspergillus niger, Aspergillus sp., Penicillium sp., Cladosporium sp., Mucor spp. Different sensitivity of these micromycetes to the disinfectant used has been established, as both drugs have a fungicidal effect on all used test cultures in concentrations of 0.1% and 0.2%.