Ventilation Tips for Crawl Spaces
Crawl space ventilation is essential to avoid moisture damage in modern, energy efficient homes. There are two types of homes that may or may not require ventilation.
1. The older model homes that use center blocks or some type of cement, with an open dirt ground or pad resting in the center, typically need the vents or shafts that will allow air to flow in and out of those shafts. This will assist in the removal of moisture seeping up from the ground into that space.
2. New homes or ones that have been modified, use vapor barriers between the home and ground, keeping the moisture from penetrating. This allows for homes with this feature to be built without vents or shafts.
The purpose of those vents is to allow moisture and damp air to flow out of those small spaces. Failing to let moisture out, eventually leads to rot, mildew, and rust.
Tips on Ventilating Crawl Spaces
The creation of energy efficient homes over the past 20 years, has also created moisture problems we never really had before. This is also true of crawl space ventilation.
Homeowners and remodelers have known for years that crawl spaces, especially in moist climates, need to be ventilated. Excessive moisture causes hardwood floors over damp spaces to cup and warp.
If you have vents that allow you to open and close them; what should you do? Homes in colder climates benefit by having the vents closed in winter. This would help keep the room over the crawl space warmer. If you live in a warm climate try keeping the vents open year-round.





