Why Crawl Space Moisture Control is Important

  • Written by: Killingsworth Environmental
  • August 27, 2016

The Importance Of Crawl Space Moisture Control

For those of you who are unfamiliar of what a crawl space is – it’s an area of limited height (similar to a small basement) most often built under or in walls of buildings.

The primary purpose of your crawl space is to promote air circulation through your home and allow easy access to plumbing, electrical and other such maintenance, repair, and installation needs. However, If you don’t take care of your crawl space, it can become a major headache, drastically diminishing efficiency and air quality, promoting fungal growth, and inviting dangerous toxins and germs into your home.

Humidity is key in controlling your crawl space moisture. Or we should say, relative humidity is key in controlling your crawl space moisture, making sure it doesn’t get to 70% or higher. Relative humidity is in comparison to the amount of moisture in the air needed for ‘saturation’ (100% humidity).

If you think you might have a relative humidity of about 70%, give us a call or contact us here and we can come by and check on it for you.

The closer it gets to 100%, the more likely you’ll start seeing condensation. The air can no longer hold all the moisture and it’s condensing onto the surfaces nearby. This causes the organic materials that make up your crawl space to become damp and mold soon after.

The best thing you can do to prevent this moisture and mold is to keep an eye out for hot days that turn into cold nights. During this situation, the daytime temperature is higher, which allows the air to hold more moisture, then when night approaches and the air cools, the amount of moisture the air can hold also decreases ‘ causing the relative humidity level to rise.

Consider investing in a hygrometer device (usually around $10). This device will help immensely when measuring the humidity of your crawl space and is a great way to monitor the amount of moisture present. As soon as it approaches 70%, you’ll know it’s time to break out the dehumidifier.

Another way to help regulate the temperature and keep moisture levels down is to ensure that you have properly insulated your crawl space by installing vapor barriers. This should keep relative humidity more stable.

For more summer home maintenance tips, be sure to check out our blog on House-Prep: Things to do Now so you can Enjoy a Carefree Summer.


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