What type of vapor barrier should be used for crawl space?
Class 1 vapor barrier, also called a vapor retarder, is the only type acceptable by building code to use in crawl spaces.
Where does vapor barrier go in crawl space?
A vapor barrier is a thick plastic sheet that is laid throughout the crawlspace of the home. They come in a variety of thicknesses, but most people agree that 6 mil is the way to go. The plastic keeps moisture from coming up underneath the ground and getting into the area underneath your home.
What should be installed to prevent moisture in the ground from entering a crawl space?
Properly installed a vapor barrier prevents moisture from the ground from migrating to the floor joists, insulation, sub-flooring, and other materials located in a crawl space.
Should I cover my crawl space with plastic?
A: The plastic cover or vapor barrier is definitely needed, especially in a dirt-floor crawl space. Without a vapor barrier, moisture will migrate to the surface of the soil and eventually cause serious problems in the crawl space, including mold and possibly structural rot. The plastic should cover the entire floor.
Should you put plastic on the ground in a crawl space?
How thick should a vapor barrier be in a crawl space?
Vapor barriers should be at least 6 mil in thickness to effectively cover the area and create a moisture barrier. Triangle Crawl Space Solutions uses both a 6 mil material for simple vapor barrier installation and a thicker more durable 12 mil vapor barrier material depending on the budget and needs of the home.
How thick should the vapor barrier be in a crawl space?
Can I use 6 mil plastic for vapor barrier?
Plastic, specifically 6-mil polyethylene plastic, is the most commonly used vapor barrier.
Is 6 mil thick enough for a vapor barrier?
What should I put down on my crawl space floor?
Dirt floors allow moist air and water to enter the crawl space. You need to hold back this moisture. And the best way of doing this is by encapsulating the crawl space. It involves laying down a 20-mil polyethylene plastic vapor barrier over the crawl space floor and walls.
Why are vapor barriers bad?
Vapor barriers are supposed to stop vapor diffusion through roofs, walls, and floors. But they can also can trap moisture, causing rot and mold. Where moisture comes from: Water vapor can be forced into wall assemblies from the warm side of the house.
What is the best thickness of vapor barrier for a crawl space?
Choosing a Crawlspace Vapor Barrier Thickness ‘ A mil is equal to 0.001 inch of thickness. Codes for residential applications often cite a 6 mil (0.006-inch thick) minimum reinforced poly vapor barrier. However, Americover recommends 10 mil or higher, for crawl space applications.