The dimples allow better conductivity for water to get to the perimeter drainage or sump pump located in the lowest spot of the crawlspace. The Drainage matting also softens the floor and increases durability.
Sealing outside air
Building scientists, and the U.S Dept of Energy agree that vented crawl spaces in warm and cold climates are a bad idea. With the Cleanspace Encapsulation system your vents will be sealed up. This will save you energy cost and make a more comfortable and healthier home.
Most dirt crawl spaces are vented to get the moisture out. The problem is that the vents let warm humid air in during the summer.
Sealing Outside Air
The Cleanspace Vent cover seals crawl spaces vents permanently from the outside to stop unwanted outside air from entering the crawl space, while covering ugly bents with an attractive panel.