Note: The following prevention guidelines recommendations are not to replace mold remediation, if it is needed.

Specific Recommendations:

MiraMold will determine if levels and the variety of mold found indoors match levels and variety of mold found outdoors. For example, if a particular variety of mold is found inside in high concentrations, but rarely found outdoors, we would be able to detect problem areas, maybe even before expensive remediation is needed. Taking these air samples have saved our customers THOUSANDS of dollars in expensive remediation. This is another aspect of preventative maintenance.

Most problems are caused by a direct result of moisture due to:

Controlling Mold

Molds that grow in houses and other buildings produce tiny spores that float continuously through the air, indoors and out. When mold spores land on a damp spot indoors, they often begin to grow, particularly if the moisture problem is not corrected quickly. Remember, molds can grow on just about any surface!

There are some technologies that can control the amount of mold spores (and other respirable agents) found in your air. Some electronic devices and high efficiency filters (HEPA) can capture 99% of the mold spores (and other airborne agents).

Mold growth can be prevented with commercial cleaning products or a bleach solution. However, this does NOT kill the spores, and is NOT recommended as a remediation technique.

If you already have mold, it is actually best to leave the mold undisturbed until you have a Certified Mold Inspector give you information about your particular situation. By disturbing (cleaning/ removing) the mold, you may allow it to enter and sporalate (or spread) throughout your house and HVAC system. Mold under carpets typically requires that the carpets and padding be removed. Once mold starts to grow in insulation or wallboard the only way to deal with the problem is by removal and replacement. Mold remediation crews typically wear full body, face and respiratory protection. In fact, human protection needed during mold remediation is mirrored with the same protection needed during asbestos remediation.

Can ozone air cleaners help remove indoor mold or reduce odors?

Sometimes air cleaners are promoted to remove indoor mold or associated odors, and some of these are designed to produce ozone. Ozone is a strong oxidizing agent that is used as a disinfectant in water and sometimes to eliminate odors. However, ozone is also known as a lung irritant. Ozone generators have been shown to sometimes produce indoor levels above the safe limit. Also, it has been shown that ozone is not effective in controlling molds and other microbial contamination, even at concentrations far above safe health levels. In addition, ozone may damage materials in the home, for example, cause rubber items to become brittle (i.e. refrigerator seals).

Recent research has shown that ozone can actually increase formaldehyde levels inside a building, because of its HIGHLY reactive ability with other compounds. For these reasons, the California Department of Health Services strongly recommends that you NOT use an ozone air cleaner in any occupied space.

Can air ducts become contaminated with mold?

Yes. Air duct systems can become contaminated with mold. Duct systems may be constructed of bare sheet metal, sheet metal with fibrous glass insulation on the exterior, or sheet metal with an internal fibrous glass liner, or they may be made entirely of fibrous glass. Bare sheet metal systems and sheet metal with exterior fibrous glass insulation can be cleaned and disinfected. If water damaged ductwork made of sheet metal with an internal fibrous glass liner or made entirely of fibrous glass will often need to be removed and discarded. Ductwork in difficult-to-reach locations may have to be abandoned. If you have other questions, contact an air duct cleaning professional or licensed contractor.


Mold and/or Mildew: Fungus that grows in damp, dark areas, causes discoloration, musty smells and odors.

Musty Odors: The result of the decay process from mold, mildew, and dry rot.

Damp Spots on Walls: Signs that water has absorbed through wall block - will have dark gray splotches in various places.

White Chalky Substance on block walls is known as efflorescence, this is a chemical breakdown of the bonding agent that holds your walls together.

Signs of possible structural deterioration: