Feature Articles
Mold and Mildew Control in Your Home
Marsha Alexander, Housing and Environmental
Design Specialist
University of Missouri Extension
Many of us have seen mold and mildew around our homes from
time to time. The problem can be particularly noticeable
during the spring and summer months. Molds that generate
mildew thrive wherever it is damp, warm, poorly lighted, and
/or where air is not circulated. Molds produce tiny spores to
reproduce. These spores float through the indoor and outdoor
air continually. When mold spores land on a damp spot indoors
they may begin growing and digesting whatever they are growing
on in order to survive. “You may find mold growth on wood,
paper, carpet, foods and many other surfaces,” says University
of Missouri Housing and Environmental Design Specialist Marsha
Alexander.
When excessive moisture or water accumulates indoors, mold
growth will often develop. This is especially true if the
moisture problem remains unnoticed or un-addressed. There is
no practical way to eliminate all molds and mold spores inside
the house. The best way to control indoor mold growth is to
control moisture and provide adequate ventilation. If you
notice a moisture problem in your home, take steps immediately
to find and fix the source of the water problem or leak to
prevent mold growth. According to the Environmental Protection
Agency, in most cases, mold will not grow if wet or damp items
are dried within 24-48 hours.
If you find mold and mildew on building materials and
furnishings, clean and dry the affected area immediately. Wash
mold off hard surfaces with detergent and water. You may also
choose to use a small amount of chlorine bleach and water on
surfaces that will not be damaged and then dry completely.
Chlorine bleach used in large quantities can be problematic so
use sparingly. Absorbent materials (such as ceiling tiles and
carpet) that become moldy may have to be replaced.
To prevent mold and mildew inside your home, reduce indoor
humidity. If you don’t have a relative humidity gauge,
purchase one so that you can monitor the indoor level. It is
recommended to keep indoor relative humidity in the range of
35% to 55%. Vent bathrooms, dryers, and other
moisture-generating sources to the outside. Use exhaust fans
whenever you are cooking. Air conditioners will help to
control indoor moisture. Utilizing de-humidifiers can also be
very effective in controlling moisture. Check the ventilation
system in your home and particularly in the attic area to make
sure vents are not covered. In areas where there is a
perpetual moisture problem such as a basement, do not install
carpeting.
For more information on preventing mold and mildew contact
your local University of Missouri Extension Center or visit
the web site at
http://muextension.missouri.edu.
Source: Marsha Alexander, Housing and
Environmental Design Specialist
University of Missouri Extension,
alexanderm@missouri.edu
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Last update: Wednesday, October 25, 2006
