These are signs of high humidity. One way to prevent moisture in a crawl space is to install a whole-home dehumidifier.
Excess crawl space moisture can be caused by:
Once the sources of standing water are addressed, you can automatically eliminate excess humidity with an Aprilaire Whole-Home Dehumidifier.
High humidity in your crawl space can damage items you store there, cause structural damage and affect the indoor air quality of your entire home.
Too much humidity can cause:
"Elevated relative humidity at a surface—70 percent or higher—can lead to problems with mold, corrosion, decay and other moisture related deterioration...An elevated relative humidity in carpet and within fabrics can lead to dust mite infestation
-U.S. Environmental Protection Agency
Aprilaire Whole-Home Dehumidifiers prevent crawl space moisture as well add the perfect level of moisture to your entire home.
Aprilaire's unique control strategy allows you to monitor the RH level in the crawl space and make set-point adjustments from a control mounted in your home.
Aprilaire Whole-Home Dehumidifiers are healthier and much easier to maintain than portables. There are no messy tanks to empty and no standing water, which could be contaminated with biological growth. Just simple, annual maintenance.