Humidity In Your Home.

Humidity is an issue year round in Florida and it’s a key component in the growth of mold. Ideal indoor humidity should ideally be between 30 percent and 50 percent. Low humidity may also help discourage pests such as roaches and also dust mites. In Florida the weather alone is to blame for high indoor humidity levels, but there are other causes such as the use of  humidifiers, clothes dryers, cooking and showering. You can measure the humidity in your home with a hygrometer, which you purchase at hardware stores. This hand held instrument displays the relative humidity in doors. Simply go room by room to measure the humidity in your entire home.

High humidity feels uncomfortable, why is that?  Your body keeps you cool by sweating. As the sweat evaporates off your skin, it causes a cooling effect.When humidity is very high it means the air is saturated with water and cant hold much more, therefor it doesn’t evaporate from your skin as quickly. High humidity makes us feel muggy and much warmer than if the room was at a lower relative humidity level. High humidity also can affect our breathing and make it difficult to sleep.

There are steps you can take to keep humidity levels in your home under control:

  • Increase airflow by using ceiling fans
  • Run the bathroom and kitchen exhausts when you shower and cook
  • Only open windows when outdoor humidity is low
  • Run a whole house humidifier

Mold growth from indoor humidity may not be as apparent as from water damage, for example it may be growing in the dry wall in on your clothing hung up in closets. If you do find that you have mold in your home due to high humidity call a qualified profession such as P.R.S. who can not only rectify the problem.


Joseph Lstiburek. “Relative Humidity” Web blog post. Reports. Building Science Corporation. 23 April 2002.









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