To vent, or not to vent—that is the question. Many local business codes require that crawl spaces have vents because they are believed to be a good way to dry out the crawl space. Recently however, scientists have called for the removal of crawl space vents altogether.
Studies have shown that vents have actually been promoting moisture and mold growth in below-grade spaces. This is most prominent in areas with high humidity levels because the moisture levels outside the home are higher than the moisture levels inside of it. This causes the crawl space to have higher moisture levels than before, promoting even more mold growth.
Luckily, some building codes acknowledge that crawl space vents are creating a problem, and therefore permit certain states to not have them. The closed vent crawl space system helps to dramatically lower humidity levels in below-grade spaces.
The reduction of moisture levels helps to prevent mold growth which is very important as mold can be very hazardous to your family’s health. To learn more about vent and closed vent crawl space systems, click on the image below.