There are many negative effects of having high moisture readings in your crawl space. High moisture readings are 18% humidity or higher. This can cause rot and mold to build up, attracts insects and critters, increases odors, and causes cold floors on the inside of the home which will increase overall heating costs. This encapsulation included the installment of a Sedona dehumidifier and 20mil liner after all the insulation and debris were removed from underneath the crawl space.