by Nick Gromicko and Ethan Ward
The Dangers of Mold
Molds produce allergens, which are substances that can cause allergic reactions, as well as irritants and, in some cases, potentially toxic substances known as mycotoxins. Inhaling or touching mold or mold spores may cause allergic reactions in sensitive individuals. Allergic responses include hay fever-type symptoms, such as sneezing, runny nose, red eyes, and skin rash (dermatitis). Allergic reactions to mold are common. They can be immediate or delayed. Molds can also cause asthma attacks in people with asthma who are allergic to mold. In addition, mold exposure can irritate the eyes, skin, nose, throat and lungs of both mold-allergic and non-allergic people. Symptoms other than the allergic and irritant types are not commonly reported as a result of inhaling mold, but can also occur.
Carpet at Risk
Carpeting is an area of the home that can be at high risk for mold growth. In order to grow, mold needs moisture, oxygen, a food source, and a surface to grow on. Mold spores are commonly found naturally in the air. If spores land on a wet or damp spot indoors that contains dust for them to feed on, mold growth will soon follow. Wall-to-wall carpeting, as well as area rugs, can provide an ample breeding ground for mold if conditions are right. At especially high risk for mold growth are carpeting located below ground level in basements, carpet in commonly moist or damp climates, and carpet that has been wet for any period of time.
Identifying Mold in Carpeting
Just because mold is not immediately apparent or visible on a carpet's surface does not mean that mold growth is not in progress. In fact, mold will probably only be visible on the surface of carpets in unusually severe cases of growth, such as carpet damaged in flooding that has remained wet for some time. The following are some examples of identifiable instances where mold growth has occurred or is likely to occur:
The best method for combating mold is to not allow mold growth in the first place. The best way to do so is by ensuring that conditions conducive to growth do not exist. Below are some ways to prevent mold growth in carpets.
In many cases, if mold has grown on carpet, cleaning will not be possible. If growth has occurred on more than one area of the carpet, or if there is a large area of growth, the carpet will probably need to be replaced.
Small areas of growth that have been quickly identified can sometimes be dealt with. Detergent and water used with a steam-cleaning machine may be enough to clean the carpet thoroughly. It is then important to ensure that the carpet dries completely after cleaning to prevent the growth from recurring. Stronger cleaning agents can be substituted if detergent does not work. Anything stronger than detergent or common rug-cleaning products should first be tested on an inconspicuous area of the carpet to ensure that the rug will not be damaged during cleaning. About 24 hours is a reasonable amount of time to wait after testing to be sure that wider cleaning will not discolor or damage the carpet.
Another option in instances where mold growth is not widespread is to remove the ruined section of the carpet. If cleaning has been attempted unsuccessfully, the area of mold growth may be removed and replaced with a patch of similar carpet. Of course, this will only work in situations where aesthetics are not a big concern, since exactly matching the patch to the original carpet may be difficult and the seam may be visible. If mold has grown in more than one area of the carpet, or if the area of growth is larger than a couple of feet, this will probably not be an effective method of mold removal.
As with all areas of the interior at risk for mold growth, prevention is the best method of control for carpet mold. Eliminating high-moisture conditions and preventing the risk of flooding or standing water will reduce the possibility of growth. Inspectors will want to know where to look for and how to identify mold growth in carpeting. It is also helpful to know how to determine if carpet should be replaced, or whether there is a possibility of cleaning and saving it.
Articles curtosey of InterNACHI
I am a United States Army Veteran with over 10 years construction experience prior to my service. After my time in the military I enrolled in InterNACHI's rigorous course work to become a certified member and prepare for the National Home Inspectors Exam. I continue to push inspection courses and education, attaining and exceeding the required continuing education courses