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Why Chlorine Bleach is Not Effective in
(1) The object to killing mold is to
kill mold at its "roots". Mold remediation involves
the need to disinfect wood and wood-based building materials, all of which
are porous materials. Thus, chlorine bleach
should not be used in mold remediation as confirmed by OSHA’s
Mold Remediation/ Clean Up Methods guidelines. The use of bleach as a mold
disinfectant is best left to kitchen and bathroom countertops, tubs and
shower glass, etc. (What is Mold?, About Mold, Mold Facts)
(2) Chlorine Bleach does kill bacteria and kill viruses, but has not been
proven effective in killing molds on non-porous surfaces. Bleach itself is
99% water. Water is one of the main contributors of the growth of harmful
bacteria and mold. Current situations using bleach re-grew and regenerated
mold and bacteria twice the CFU counts than were originally found before
bleaching, within a short period of time. Bleach is an old method used for
some bacteria and mold. It is the only product people have known for years.
The strains now associated within Indoor Air quality issues are resistant to
the methods our grandmothers employed to clean-up mold.
(3) What potential mold ‘killing’ power chlorine bleach might have, is
diminished significantly as the bleach sits in warehouses, on grocery store
shelves or inside your home or business 50% loss in killing power in just
the first 90 days inside a never opened jug or container. Chlorine
constantly escapes through the plastic walls of its containers.
(4) The ionic structure of bleach prevents Chlorine from penetrating into
porous materials such as drywall and wood—it just stays on the outside
surface, whereas mold has enzyme roots growing inside the porous
construction materials—however, the water content penetrates and actually
FEEDS the mold—this is why a few days later you will notice darker, more
concentrated mold growing (faster) on the bleached area.
(5) Chlorine Bleach accelerates the deterioration of materials and wears
down the fibers of porous materials.
(6) Chlorine Bleach is NOT registered with the EPA as a disinfectant to kill
mold. You can verify this important fact for yourself when you are unable to
find an EPA registration number for killing mold on the label of any brand
of chlorine bleach.
(7) Chlorine bleach off gases for a period of time. Chlorine off gassing can
be harmful to humans and animals. It has been known to cause pulmonary
embolisms in low resistant, and susceptible people.
(8) Chlorine bleach will evaporate within a short period of time. If the
area is not dry when the bleach evaporates, or moisture is still in the
contaminated area (humidity, outside air dampness), you could re- start the
contamination process immediately and to a greater degree.
(9) Chlorine is a key component of DIOXIN. One of the earliest findings of
dioxin’s toxicity in animals was that it caused birth defects in mice at
very low levels. This finding led to dioxin being characterized as “one of
the most potent teratogenic environmental agents”. The first evidence that
dioxin causes cancer came from several animal studies completed in the late
1970’s. The most important of these, published in 1978 by a team of
scientists from Dow Chemical Company, led by Richard Kociba, found liver
cancer in rats exposed to very low levels of dioxin. This study helped
establish dioxin as one of the most potent animal carcinogens ever tested
and, together with the finding of birth defects in mice, led to the general
statement that dioxin is the “most toxic synthetic chemical known to man.”
Never mix chlorine with ammonia products, as the result is extremely toxic.
Using bleach can cause serious health problems.
The fumes are very caustic and great care must be taken not to breath it in
It is also very damaging to clothing and carpeting, the human body, and the
Never mix chlorine with ammonia products, as the result is extremely toxic.
It is impossible to completely eliminate airborne mold. Specialists warn
that living in environments entirely safe from mold spores, bacteria or
viruses would not be healthy since our immunological system needs to be
active. It is recommended that steps be taken to reduce airborne
microorganisms, not complete extermination.
Reduce humidity in your home by opening windows for approximately 30
Prevent leaks due to rain; and when unavoidable, dry and treat water
damage within 24 to 48hours.
Regularly clean places that accumulate humidity such as showers, faucets
and pipes and the floor areas around such fixtures.
Limit carpets and plants in your home.
Use air purifier to drastically reduce high contamination levels.
Whenever possible, leave objects exposed to sunlight after cleaning. It is
very important that objects are dried after cleaning otherwise they will
be subject to new mold contamination.
Porous materials such as wood, fabric, cushions, and mattresses retain
water and are likely to be contaminated, making it difficult to clean
them. In the event that these objects are contaminated, it is advised to
OPPOSING VIEWS AND CONFUSION
Chlorine bleach, commonly referred to as laundry bleach, is generally
perceived to be an “accepted and answer-all” biocide to abate mold in
the remediation processes. Well-intentioned recommendations of the
Environmental Protection Agency (EPA) and other federal, state and
local agencies are perpetuating that belief. And confusing the issue
is one federal agency, the Occupational Health and Safety
Administration (OSHA), taking an opposing point of view by NOT
recommending the use of chlorine bleach as a routine practice in mold
DOES BLEACH REALLY KILL MOLD?
Will chlorine bleach kill mold or not? yes or no? The answer is yes,
but with a caveat. That answer comes from The Clorox Company, Oakland
CA, manufacturer and distributor of Ultra Clorox Regular Bleach. The
company’s correspondence to Spore Tech Mold Investigations, LLC stated
that their Tech Center studies supported by independent laboratories
show that “3/4 cup of Clorox liquid bleach per gallon of water will be
effective on hard, non-porous surfaces against Aspergillus niger and
Trichophyton mentagrophytes (Athlete’s Foot Fungus)”. Whether or not
chlorine bleach kills other molds and fungi, the company did not say.
The words “hard, non-porous” surfaces” present the caveat. Mold
remediation involves the need to disinfect wood and wood-based
building materials, all of which are porous materials. Thus, chlorine
bleach should not be used in mold remediation as confirmed by OSHA’s
Mold Remediation/ Clean Up Methods guidelines. The use of bleach as a
mold disinfectant is best left to kitchen and bathroom countertops,
tubs and shower glass, etc.
WHY CHLORINE BLEACH IS NOT RECOMMENDED FOR MOLD
Chlorine bleach (sodium hypochlorite) is corrosive and that fact is
stated on the product label. Yet the properties of chlorine bleach
prevent it from “soaking into” wood-based building materials to get at
the deeply embedded mycilia (roots) of mold. The object to killing
mold is to kill its “roots”. Reputable mold remediation contractors
use appropriate products that effectively disinfect salvageable mold
infected wood products. Beware of any mold inspector or mold
remediation company that recommends or uses chlorine bleach for mold
clean up on wood-based building materials.
CHLORINE BLEACH IS ACTIVE INGREDIENT IN NEW MOLD &
The appearance of new mold and mildew household products on store shelves
is on the rise. Most are dilute solutions of laundry bleach. The labels on
these mold and mildew products state that they are for use on (again)
hard, non-porous surfaces and not for wood-based materials. Instructions
where not to apply the products are varied. A few examples where the
branded products should not be applied include wood or painted surfaces,
aluminum products, metal (including stainless steel), faucets, marble,
natural stone, and, of course, carpeting, fabrics and paper. One
commercial mold and mildew stain remover even specifically states it
should not be applied to porcelain or metal without immediate rinsing with
water and that the product isn’t recommended for use on formica or vinyl.
Before purchasing a mold and mildew product, read and fully understand the
advertised purpose of that product and correctly follow the use
instructions of a purchased product. The labeling claims on these new
products can be confusing some say their product is a mold and mildew
remover while another says their product is a mildew stain remover and yet
others make similar ‘ambiguous’ claims. Make double sure that the product
satisfies your intended need on the surface to which it is to be applied.
If your intention is to kill mold, make sure the product does exactly that
and follow the directions for usage. Consumers may find that mixing their
own diluted bleach solution will achieve the same results as any of the
new mold and mildew products. Keep in mind that the use of chlorine bleach
is not for use on mold infected wood products including wall board,
ceiling tiles, wall studs, fabric, paper products, etc.
WHY CHLORINE BLEACH IS NOT
RECOMMENDED FOR MOLD REMEDIATION
Chlorine bleach (sodium hypochlorite) is corrosive and that fact
is stated on the product label. Yet the properties of chlorine
bleach prevent it from “soaking into” wood-based building
materials to get at the deeply embedded mycilia (roots) of mold.
The object to killing mold is to kill its “roots”. Reputable mold
remediation contractors use appropriate products that effectively
disinfect salvageable mold infected wood products. Beware of any
mold inspector or mold remediation company that recommends or uses
chlorine bleach for mold clean up on wood-based building
Laundry bleach is not an effective mold killing agent for wood-based
building materials and NOT EFFECTIVE in the mold remediation process.
OSHA is the first federal agency to announce a departure from the use
of chlorine bleach in mold remediation. In time, other federal
agencies are expected to follow OSHA’s lead. The public should be
aware, however, that a chlorine bleach solution IS an effective
sanitizing product that kills mold on hard surfaces and neutralizes
indoor mold allergens that trigger allergies.
Dust Free Bio-Fighter
Replacement UV Bulbs
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Fighter washable electrostatic air filters
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About Mold, Mold Facts
Facts About Indoor Air Quality
How Photocatalytic Oxidation
Replacement Ceramic Ozone Filter Plates
and their size in microns
Effects of Negative Ions
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