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Crawl Space Learning Center

Common Issues with Crawl Spaces

About 27 million homes in the U.S. are built on a crawl space. With 15 to 20 percent of new homes continuing to be built on crawl spaces, the number only grows each year.

Many crawl spaces develop problems including excessive moisture and all that comes with it: mold and mildew, wood rot, corrosion, poor indoor air quality, and insect and pest infestations. These issues can also cause excessive energy loss, cold and springy floors above, higher fuel bills, and greater wear and tear on HVAC equipment.

Most of these problems are due to one-size-fits-all building codes, cost-cutting construction practices, inadequate waterproofing, and insufficient air sealing and insulation. Fortunately, building scientists have revised their thinking about crawl spaces in recent years, and have devised ways to eliminate or at least significantly minimize the issues associated with crawl spaces. Building codes around the country are changing to reflect these new practices, as well.

Crawl Space Terms Diagram

Crawl Space Science

Dirt crawl space with vents

The practice of building dirt crawlspaces with open vents is an older, outdated way of installing a crawl space. Newer crawl space science debunks this old methodology. Explore typical crawl space issues, and discover how your crawl space may be affecting your health and the indoor air quality of your home.


Crawl Space Solutions

Crawl space sealed with CleanSpace® System

Crawl Space encapsulation reflects the modern methodology of how to best improve the environment of a home's crawl space. Learn about options for controlling moisture, humidity, and air quality in your crawl space.


Crawl Space Energy

Most dirty crawl spaces have a significantly negative impact on the energy efficiency of a home. The damp air in these crawl spaces is harder to heat and cool, requiring your HVAC system to put in extra work, leading to extra costs. Learn more about Crawl Space Energy and how you can make your home more energy-efficient.

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