Mold growth is frequent in dark, damp, and poorly ventilated spaces, as well as in the aftermath of fire and water damage. Lack of proper ventilation can also lead to mold growth in a building. The mold will leave black stains on the walls, joints, or sealant margins. In many cases, a musty odor will also develop.
Common mold hotspots include: attics, basements, bathrooms, or kitchens. It can also be found in HVAC systems, on window sills, or in houseplants.