A method of treating a building for mold contamination including the steps of assessing and locating mold growth areas, constructing a containment barrier around the mold growth areas, vacuuming, abrading and surface treating the mold growth areas, ceilings, walls and window treatments with mold cleaner, replacing air filters from air handlers, removing all registers and vent grills in the treated areas and washing the vent grills with mold cleaner, vacuuming all registers and accessible ductwork, treating the heating and ventilation system, associated ductwork and wall cavities with an atomized mold cleaner, vacuuming all flooring, horizontal surfaces, walls, furniture and mattresses, re-vacuuming all flooring, re-treating the heating and ventilation system and associated ductwork with an atomized mold cleaner and re-treating the work area including any exposed wall cavities with an atomized mold cleaner, deconstructing and discarding containment barrier and reinstalling all registers and vent grills.