The initial step in the assessment process involves a thorough, non-invasive examination to determine the presence of mold through visual inspection of the premises, also known as a mold inspection. The visibility of mold assists in determining the extent of removal required. If mold is actively growing and clearly visible, sampling for its specific species is deemed unnecessary. At times, a more intrusive observation is necessary to gauge the level of mold present, which may involve moving furniture, lifting or removing carpets, inspecting behind wallpaper or paneling, checking ventilation ductwork, and exposing wall cavities. It is crucial to conduct a detailed visual inspection and be mindful of musty odors in order to identify any issues. Emphasis should be placed on areas demonstrating signs of liquid moisture or humidity, or where potential moisture problems may arise.

The primary step in addressing an indoor mold issue is to eliminate the source of moisture; new mold can begin developing on damp, permeable surfaces within 24 to 48 hours. There are various methods to prevent mold growth. Some cleaning firms specialize in restoring fabric, removing mold (and spores) from clothing to eliminate odors and halt further damage to garments. The most efficient way to address mold is by using detergent solutions that physically eliminate it. Many commercially available detergents designed for mold cleanup contain an EPA-approved antifungal agent. Extensive mold growth may necessitate professional mold remediation to eliminate affected building materials and eliminate the root cause of excess moisture. In severe instances of mold proliferation in buildings, condemning the structure may prove more cost-effective than reducing mold to safe levels.