Why Test For Mold?
Mold Health Effects
Mold & Property Damage
Ozone Generator Facts
What is Mold?
Types of Mold
Where Mold Comes From
Mold Warning Signs
Hidden Molds
Mold Prevention
Mold Cleanup
California Mold Law
OSHA on Mold
Blood Testing for Mold
Mold FAQs

MOLD PREVENTION

  • Fix leaky plumbing and leaks in the building envelope as soon as possible.
     
  • Watch for condensation and wet spots. Fix source(s) of moisture problem(s) as soon as possible.
     
  • Prevent moisture due to condensation by increasing surface temperature or reducing the moisture level in air (humidity). To increase surface temperature, insulate or increase air circulation. To reduce the moisture level in air, repair leaks, 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), ideally 30-50%, if possible.
     
  • Perform regular building/HVAC inspections and maintenance as scheduled.
     
  • Clean and dry wet or damp spots within 48 hours.
     
  • Don't let foundations stay wet. Provide drainage and slope the ground away from the foundation.


PREVENTING MOLD:
Mold requires 3 basic elements to grow; moisture, warm air, and a food source. Depriving mold of any of these three items will limit, and in some cases prevent it from growing, but it will not kill the mold that is already present. Mold spores will remain dormant, and if the moisture, warmth and food all reappear, mold will begin to grow again.

Remember: Mold does not have to be alive to cause health problems in people or animals. Dormant and even non-viable (dead) mold can be just as harmful as viable (alive) mold.

1: The most important steps in controlling mold growth are to clean any existing mold and to eliminate moisture intrusion that caused it.

2: The number 1 cause of indoor mold problems is outdoor irrigation and drainage. Wall materials such as stucco and wood absorb water. Make sure sprinklers do not hit exterior walls. Make sure plants do not touch exterior walls and rain water is routed away from your building. Gutters and downspouts are the best way to manage rain water. Concrete slabs act just like a sponge. They absorb water out of the soil and hold it for extended periods. In turn, materials that make contact with wet slabs, such as carpet, padding, tack strip, moldings and other construction framework, absorb moisture out of slabs creating ideal conditions for mold growth. Over watering plants, grass and flower beds, is the primary contributor to this destructive scenario. When watering, make sure that the soil against your building dries completely within 3 hours of watering.

3: Cob webs and dust are mold magnets. Airborne spores get trapped and can begin to grow. Vacuum and clean regularly to remove dust and cob webs in your home, especially behind refrigerator and other appliances that are not always included in routine vacuuming.

4: Carpeting in bathrooms is a big No-No. In portions of your home that are susceptible to moisture, use area rugs or washable floor surfaces rather than wall-to-wall carpeting. If you use area rugs, launder them periodically.

5: Do not store materials such as paper, books, clothes, or other possible sources of food for mold in humid parts of your home.

6: Repair water leaks in your roof, windows, or any other part of the home immediately.

7: Clean refrigerator drip pans regularly according to the manufacturer's instructions. If your refrigerator and freezer doors do not seal properly, moisture can build up and mold can grow there. Remove any mold on the door gaskets and replace faulty gaskets.

8: If you live in a house, make sure that your gutters and downspouts are clear of debris that may block the flow of water from your roof. Make sure the area under your downspouts is properly graded so that rainwater from the roof flows away from your foundation. Splash blocks can help rainwater to flow in the proper direction. If necessary, extend your downspouts.

9: Make sure other areas around your foundation are graded so that rainwater does not flow toward the house. Do not put gardens or plants too close to your foundation so that watering them could cause water to flow toward your house. If you water your lawn with a sprinkler, make sure the water does not hit your house or the area next to the foundation.

10: In the kitchen and bathroom, open windows or use exhaust fans when engaging in activities that produce moisture. Exhaust fans should be vented to the outdoors and not to an attic or crawl space. If your shower areas do not have exhaust fan, install them and wire them to the light switch so they cannot be ignored.