An Inside Look at Mold Issues in Homes
Fungi include yeast, mold, mildew and mushrooms. Fungi grow over a wide range of environmental niches and are able to colonize on any surface, provided moisture is present. Spores are very lightweight and are easily dispersed in air.
Every home is subject to moisture problems, either due to leakage (flooding, pipes bursting, and overflows) or routine activities (showering, watering indoor plants, cooking). Molds are easily distributed indoors due to natural breezes, heating/ventilation and cooling systems, humidifiers and active movement.
Molds are known to cause a variety of health effects, including mild skin infections to severe allergic reactions to lung disease, cancer, organ failure, neurological disorders and death.
Table 1: Sources of Indoor Moisture
|Problem Sources||Common Sources|
|Flooding||Steam from cooking|
|Backed-up sewers||Wet clothes or indoor drying lines|
|Toilet overflows||Appliance drip pans|
|Clogged drains||Appliances vented indoors|
|Mud or ice dams||Damp basement or crawl spaces|
|Leaking pipes||House plants or attached greenhouses|
|Outside water intrusion||Shower or bath steam and leaks|
|Clothes dryers vented indoors|
|Condensation on windows or walls|
|High indoor humidity|
The most common indoor molds are Cladosporium, Penicillium, and Aspergillus. These are primarily associated with allergic reactions, headaches, itchy eyes, rashes and respiratory problems, but they are also known to produce mycotoxins, resulting in chemical toxigenic responses. However, perhaps the most disconcerting indoor molds are Stachybotrys and Chaetomium. These mold species, even in small doses, are associated with severe, often irreversible neurological conditions, lung disease and death.
Mold development requires Moisture, Food (which is typically Cellulous), and Time. Eliminate any one of the three variables and mold will not develop.
The level of mold needed to make people sick varies with the individual. In general, if the mold is visible or odiferous, it should be eliminated.
Table 2: Symptoms Associated with Pathogenic Molds
|Hay fever||Mood changes or irritability|
|Sneezing||Difficulty in concentration|
|Shortness of breath||Kidney failure|
|Nausea||Rashes and dermatitis|
|Aches and pains||Infertility|
|Tracheal bleeding||Hormonal imbalances|
|Nose bleed||Sudden infant death syndrome|
Preventing a home from becoming moldy is far easier (and cheaper) than trying to eliminate a fungal colonization. The most important step for elimination of mold in buildings:
- Remove the moisture source.
- Reduce the contaminant via routine cleaning and disinfecting. Numerous commercial products are widely available for disinfecting non-porous surfaces.
- Carpeting and other porous material should be carefully removed.*
A mold inspection includes the following:
- Complete visual inspection of the residence, apartment or building.
- At least 2 air samples: 1 inside and 1 outside – reveals the type of mold spores and in what quantity, measured in spores per cubic meter.
- Samples of visible mold (Dry Wall, Paneling, etc).
- Comprehensive written report.
For questions regarding mold or to schedule a mold inspection, please call us: American Environmental Laboratories, LLC at (314) 664-2800.