| Molds
and mildew are fungi that grow on the surfaces of objects, within
pores, and in deteriorated materials. They can cause discoloration
and odor problems, deteriorate building materials, and lead to allergic
reactions in susceptible individuals, as well as other health problems.
The following conditions are necessary
for mold growth to occur on surfaces:
- temperature range above 40°
F and below 100° F
- mold spores
- nutrient base (most surfaces
contain nutrients)
- moisture (water or high humidity)
Human comfort constraints limit the
use of temperature control.
Spores are almost always present
in outdoor and indoor air.
Almost all commonly used construction
materials and furnishings can provide nutrients to support mold
growth.
MOISTURE CONTROL IS THUS AN IMPORTANT
STRATEGY
FOR REDUCING MOLD GROWTH
Carpeting should never be used in areas
(such as on-grade concrete floors) where persistent moisture is present.
Any porous material in a building
that has been microbially contaminated should be discarded; disinfection
is rarely effective. Contaminated insulation, ceiling tiles and
rugs must be removed.
Smooth surface materials that have
become contaminated can be cleaned with a biocide. Contact Physical
Plant Custodial Services and request cleaning for your area.
If you are experiencing a mold/mildew
problem the moisture source must be controlled or abated. Physical
Plant should be contacted and a work order submitted.
Source:
U.S. Environmental Protection
Agency. December 1991. Building Air Quality: A Guide for
Building Owners and Facility Managers. pp. 229
American Conference of Governmental
Industrial Hygienists. 1989. Guidelines for the Assessment
of Bioaerosols in the
Indoor Environment.
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