Mold Prevention

  • Moisture control is the key.

  • Keep the building clean and dry. Dry any wet or damp areas within 48 hours.

  • Fix leaky plumbing and any leaks in the building’s envelope as soon as possible.

  • Watch for condensation and wet spots. Fix the sources of moisture problems as soon as possible.

  • Prevent moisture due to condensation by increasing surface temperature or reducing the moisture level in the air (humidity). To increase surface temperature, insulate, or increase air circulation. To reduce the moisture level in the air, repair leaks and increase ventilation (if outside air is cold and dry), or dehumidify (if outdoor air is warm and humid).

  • Keep heating, ventilation and air conditioning (HVAC) drip pans clean, flowing properly, and unobstructed.

  • Vent moisture-generating appliances, such as dryers, to the outside, where possible.

  • Maintain low indoor humidity, below 60% relative humidity (RH), and, ideally, between 30% and 50%, if possible.

  • Perform regular building and HVAC inspections and scheduled maintenance.

  • Don’t let foundations stay wet. Provide drainage, and slope the ground away from the foundation.

  • If you are not experienced with home and building repairs, you may want to consult a professional when making necessary repairs, or for assistance related to mold-prevention changes to your home or building.

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