A crawl space is a foundation that sits higher than the ground. It’s responsible for keeping the house safe from flooding and gives you easy access for maintenance work, like fixing pipes, electrical systems, and HVAC systems, without hassle. Made of concrete or brick with support beams, crawl spaces keep the house dry, well-ventilated, and stable, and they’re a smart option for homes that wouldn’t benefit from having a basement.
Why Do Houses Have Crawl Spaces?
Crawl spaces offer several key benefits for homes. Using piers and beams to lift the house off the ground, crawl spaces help keep moisture and minor flooding away from the living spaces. This improves airflow beneath the home, reduces humidity, and lowers the risk of mold. They also allow easy access to plumbing, electrical, and heating and cooling systems for maintenance and repairs. When properly managed and sealed, crawl spaces can even help prevent pest problems, making them ideal for many buildings.
Types of Crawl Spaces
Crawl spaces are built in different ways to control moisture and airflow. There are two main types, and the right option for a home depends on the climate, soil, and the home.
- Vented crawl space: This has vents in the foundation walls that allow air to flow under the home, helping reduce moisture and humidity.
- Encapsulation crawl space: Fully sealed with a vapor barrier and often insulated or paired with a dehumidifier, this option offers better moisture control and cleaner air.
How are Crawl Spaces Built?
Crawl spaces are created by building short concrete or masonry walls around the house. Inside, support piers hold up the floor above. The ground is leveled and often covered with gravel to improve drainage, and floor joists are then placed to support the house. To keep the space dry and protect the home, moisture barriers, vents, and insulation are often added.
