Thinking
about swabbing those mold spots with bleach? Think again. This home remedy,
which was once widely used and even recommended by government agencies as a
first defense against mold, is NOT recommended. In fact, the EPA now recommends
against using mold in its publication titled A Brief Guide to Mold, Moisture, and Your Home. This publication
says:
“The use of a chemical
or biocide that kills organisms such as mold (chlorine bleach, for example) is not
recommended as a routine practice during mold cleanup.”
Why not?
After all, homemakers have been spraying bleach on mold spots for generations.
There are several compelling reasons not to use bleach as a mold cleanup agent
including its health effects, limited effectiveness, and potential to cause
additional damage to building materials.
Adverse Health Effects of Chlorine Bleach
If you’re
concerned about mold’s health effects, why would you want to subject yourself
and your family to a dangerous chemical? Take a look at the warning label on
your bleach bottle and you’ll see an exhaustive list of potential dangers such
as:
“IRRITANT: May cause
severe skin and eye irritation or chemical burns to broken skin. Causes eye
damage. . . Strong oxidizer: Do not use or mix with other household chemicals
such as toilet bowl cleaners, rust removers, acid or ammonia containing
products. To do so will release hazardous gasses. . . Wear safety glasses and
rubber gloves when handling this product. Wash after handling. Use with adequate
ventilation.”
In
addition to the corrosive and irritating effects of bleach, if you or a family
member is allergic to chlorine, using household bleach in the home should be
avoided as chlorine gas could be emitted in the presence of other chemicals.
When
bleach mixes with other chemicals such as ammonia or acid, hazardous, sometimes
fatal, gasses are released that can cause coughing, shortness of breath,
irritation to eyes, nose and throat, chest pain, vomiting, fluid buildup in the
lungs, pneumonia, or even death at higher exposures.
While you
may not intend to mix chemicals, inadvertent mixing can occur. For example, if
your toilet has a ring of mold, you may be tempted to pour some bleach in the
toilet bowl in an effort to bleach the mold away. But what about that automatic
toilet cleaner that you installed in the tank? What chemicals does it infuse
into the water with each flush?
Ammonia is
commonly found in glass cleaners, paints, and urine while acid is often found
in toilet bowl cleaners, glass cleaners, drain cleaners, automatic dish
detergents/rinses, rust removers, lime and calcium removers, brick and concrete
cleaners, and vinegar.
Limited Effectiveness of Bleach on Mold
Even if
bleach weren’t so toxic to you and your family, it has a limited effectiveness
on mold. While bleach can kill mold on hard, porous surfaces, it is ineffective
at killing mold when applied to porous building materials such as wood
products. Mold sends out deep roots which penetrate wallpaper, drywall, ceiling
tiles, carpets, insulation, baseboards, and upholstery. Since the bleach is
unable to reach these roots, the mold quickly grows back after the initial
application of bleach.
Bleach’s Damaging Effects to Materials
If you
take a look at the warning label on your bleach bottle, you’ll likely see
additional warnings such as:
“Prolonged contact with
metal such as silver may cause pitting or discoloration.”
While
you’re more likely to try mold on your walls than on your family’s heirloom
silver set, these warnings should not be taken lightly. For example, if you
pour bleach into a sink and allow it to sit for a few minutes, you may notice
discoloration around the stainless steel drain. In addition to its damaging
effect on metals, bleach and commercial “mildew removers” containing bleach should
not be applied to marble or natural stone, wood or painted surfaces, aluminum,
faucets, fabrics, carpets, and paper. These are but a few examples of surfaces
that should be avoided that are commonly listed on products containing bleach.
Corrosion and bleaching are among the adverse effects.
With its
adverse health effects, limited effectiveness on solving mold problems, and
damaging effects on the surfaces where mold is found, bleach is perhaps the
worst possible choice for dealing with mold and mildew. If your house has a few
flecks of mold, a good scrubbing with gentle cleansers followed by controlling
the underlying moisture problem may be enough. If the problem is more severe,
contact a professional mold remediation company for safe mold removal.
By: Mr.
Mark Decherd
For more information and other articles by Mark Decherd go to:
Dryout® Inc.
239-437-7100
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