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Moisture and Mold Prevention and Control Tips

Moisture Control is the Key to Mold Control moldy suitcase

Mold growing on the surface of a unit ventilator.  Click on the image for a larger version.

Actions that will help to reduce humidity


Condensation on the inside of a windowpane.

Actions that will help prevent condensation

Mold growing on a wooden headboard

Mold growing on a wooden headboard in a room with high humidity.  Click on the image for a larger version.

Testing or Sampling for Mold

Is sampling for mold needed?  In most cases, if visible mold growth is present, sampling is unnecessary.  Since no EPA or other federal limits have been set for mold or mold spores, sampling cannot be used to check a building's compliance with federal mold standards.  Surface sampling may be useful to determine if an area has been adequately cleaned or remediated.  Sampling for mold should be conducted by professionals who have specific experience in designing  mold sampling protocols, sampling methods, and interpreting results.  Sample analysis should follow analytical methods recommended by the American Industrial Hygiene Association (AIHA), the American Conference of Governmental Industrial Hygienists (ACGIH), or other professional organizations.

Rust is an indicator that condensation occurs on this drainpipe.  The pipe should be insulated to prevent condensation.  Click on the image for a larger version.

Renters:  Report all plumbing leaks and moisture problems immediately to your building owner, manager, or superintendent. In cases where persistent water problems are not addressed, you may want to contact local, state, or federal health or housing authorities.

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