Atlanta Mold LLC News and Information
The most frequently encountered mold found upon inspection is Penicillium/Aspergillus type. Often referred to as mildew. This is a ubiquitous mold in the exterior world environment. It is responsible for the decay of much plant matter residing around the home. These types of mold cannot be differentiated by evaluation of the spores as they are almost identical. They belong to a class of fungi referred to as mitosporic – meaning the spores contain a complete genome. They do not require sexual reproduction in order to germinate and grow.
Of all the mitosporic fungi found in moisture insulted structures, Penicillium/Aspergillus is about the only type that does not require almost saturated water conditions. They can thrive in sustained relative humidity environments above 70%. That is enough moisture for the very small spores to hydrate themselves and turn on metabolic growth.
Penicillium/Aspergillus Type Mold
Universal and most often seen on fungally contaminated surfaces
Very small spores, thousands can sit on the eraser of a pencil
Thrives in elevated relative humidity environments, not water saturated
Penicillium/Aspergillus type mold in crawl space
Generally light gray to light green in color
Environmental causation - high relative humidity environment
Penicillium/Aspergillus growth on wall in finished basement
Light green colonies all over the wall
Hard to detect - must look tangent to the surface
Uncontrolled high air moisture - must use dehumidification
Penicillium/Aspergillus growth on bathroom vanity
This mold will grow on any surface in high moisture environment
Penicillium/Aspergillus type mold on closet door
How was this allowed to happen?
Uncontrolled air moisture in the home was the cause
Keep HVAC operating when you leave your home
Do not allow any part of your home to experience sustained periods of high relative humidity. If RH exceeds 70% for just a few days time, that is enough moisture to allow the ubiquitous Penicillium/Aspergillus spores to start to grow. In particular, take especial care of basements, closets, crawl spaces and any other non-conditioned spaces in your home.