It’s important to note that while it will help prevent damage and ongoing problems over time, a dehumidifier will not kill any mold already present in an area. The mold will essentially go dormant as it dries out and can be easily revived again with the right environmental conditions, unless it is killed and cleaned away.  

For instance, in areas that have had invasive flooding, a dehumidifier will be able to quickly pull the moisture from the room and from the drywall or flooring to prevent extensive spread of damage.  

If moisture is allowed to set in, mold will be able to take hold in areas that aren’t treated with an effective fungicide. Mold can then continue to grow in the dark, damp space if the drywall is not removed, the mold treated, and the moisture eliminated. In those situations, it’s always best to consult with a local contractor or clean-up specialist if you suspect mold inside the walls. 

For visible, surface mold and mildew, there are multiple ways to treat the area that will effectively kill the problem spores and the underlying membrane that facilitates its growth. 

· For cracks in cement or grouted tile, use a steam cleaner over the area. The steam needs to reach a temperature of between 180- and 220-degrees Fahrenheit in order to kill mold. 

· If you don’t mind the smell, use a spray bottle to saturate the area in vinegar. Do not wipe or rinse it away. 

· Essential oils offer a slightly less abrasive smell than the vinegar. Use a solution of either 2 teaspoons tea tree oil to 2 cups water, or 20 drops of grapefruit or citrus seed extract mixed in 2 cups of water.

No matter how you choose to treat a mold problem, a dehumidifier is one tool available to help control the environment in your home to keep it under the 60% humidity level that allows molds and other problems to grow and spread. Proper temperature and ventilation control with a dehumidifier, effective HVAC system, and other types of fans help keep your home and family healthy.