This is always a hot topic and a concern for most buyers. I do not do airborne mold testing, I refer clients to professionals who do testing for a living and have degrees in this area and are nationally certified as a laboratory. Most home inspectors simply buy a $300. kit, take a 4 hour course then call themselves mold experts. For 8 years I have refused to take this easy approach and would rather refer the client to others. With that being said, there are a lot of questions so here is some information.
Molds are simple, microscopic organisms whose purpose in the ecosystem is to break down dead materials. Molds can be found on plants, dry leaves, and on just about every other organic material. Some molds are useful, such as those used to make antibiotics and cheese. Some molds are known to be highly toxic when ingested, such as the types that invade grains and peanuts. Most of the mold found indoors comes from outdoors. Molds reproduce by very tiny particles called spores. The spores float in on the air currents and find a suitable spot to grow. Spores are very light and can travel on air currents. If mold spores land on a suitable surface, they will begin to grow. Molds need three things to thrive- moisture, food and a surface to grow on. Molds can be seen throughout the house, and can be found in most bathrooms. Mold growth can often be seen in the form of discoloration, and can apear in many colors-white, orange, pink, blue, green, black or brown. When molds are present in large quantities (called colonies) they can cause health problems in some people.
Who does mold affect?
Mold spores can cause adverse reactions, much like pollen from plants. Mold spores cause health problems when they become airborne and are inhaled in large quantities. Everyone is exposed to mold in some concentration in the outdoor air. Indoor exposure to molds is not healthy for anyone. In particular, people with allergies, existing respiratory conditions or suppressed immune systems are especially susceptible to health problems from mold exposure. Additionally, infants and children, pregnant women and the elderly can be sensitive to the effects of mold exposure. Some molds are more hazardous than others. For some people, a small number of mold spores can cause health problems. For others, it may take many more.
Symptoms of mold exposure
There are many symptoms of mold exposure. The extent of symptoms depends on the sensitivity of the exposed person. Allergic reactions are the most common and typically include: respiratory problems such as wheezing and difficulty breathing; nasal and sinus congestion; burning, watery, reddened eyes or blurry vision; sore throat; dry cough; nose and throat irritation; shortness of breath; and skin irritation. Other less common effects are: nervous system problems (headaches, memory loss, moodiness); aches and pains; and fever. If you have any of these symptoms, and they are reduced or completely gone when you leave the suspect area, chances are you have been exposed to some sort of allergen, quite possibly mold.
How can I tell if I have mold in my home?
Some mold problems are obvious - you can see it growing. Others are not so obvious. If you can see mold, or if there is a musty odor in your home, you probably have a mold problem. Areas that are wet, or have been wet due to flooding, leaky plumbing, leaky roofing, or areas that are humid (such as bathrooms and laundry rooms) are most likely to have mold growth. Look for previous water damage. Visible mold growth may be found underneath wallpaper and baseboards, behind walls, or may be evident by discolored plaster or drywall. If you don't have any observable mold, but are experiencing symptoms likely to be mold-induced, the mold could be growing in areas you can't see, such as the ducts of a heating/cooling system. In this case, the only way to know if you have mold spores is to test.
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