Key takeaways
- Warm, humid air entering a cool space condenses on surfaces
- Open vents also let pests and drafts in
- Many homes do better with a sealed, controlled space
- Sealing works best with drainage and drying
Crawl space vents come from an older idea: let outside air dry the space.
What happens in summer
Warm, humid air meets cooler surfaces and drops its water as condensation.
Other downsides
Vents bring in pests and cold drafts, and they leak conditioned air from the house above.
A different approach
Sealing the vents and controlling humidity directly keeps the space steady all year.
Related services
Questions about your own crawl space? Call or text 800-207-0499, or use the estimate form below.