Crawlspace Encapsulation
When the crawlspace of your home is encapsulated, it means that the entire crawl space has been sealed completely in white plastic. When you choose this method, you need to install a dehumidifier and a sump pump. This will reduce the risk of mold, and it makes for far cleaner air as well.
Choosing crawl space encapsulation means you have 100% of the ground covered in white plastic with all junctions and seams wholly sealed.
Vapor Barrier
A vapor barrier is a different installation process. Instead of laying down 1005 white plastic, you are laying down 6mm of black plastic throughout the crawlspace floor. The vents are not sealed unlike with crawl space encapsulation, so there’s no need to use a dehumidifier.
Furthermore, vapor barrier installation doesn’t need a sump pump. It is also more affordable than crawl space encapsulation.