How To Identify Black Mold On Drywall. Black mold typically grows in a circular pattern, with round colonies ranging from. In our experience, black mold typically grows outwards from its point of origin and tends to affect basements, garages and attics as well as kitchens and bathrooms.
The mold will also look to be slimy on wet surfaces and sooty on those surfaces that were previously wet, but now have dried. The poisonous effects of black mold are due to its mycotoxins—a group of toxic substances known to lead to cancer and immune deficiency. Try to find a source of a musty smell.
The process to remove black mold from drywall is the same as with any other fungi.
The best way to control mold growth is to control moisture. Stachybotrys chartarum, which dominated the mold on this drywall, really likes wet conditions. Mildew may begin as white, then turn brown or gray. Toxic black mold growing on soaking wet paper on the floor of an ac closet.