What MIL is best for crawl space vapor barrier?
‘ 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. Americover offers thicknesses all the way up to 20 mil.
Is it good to put plastic in crawl space?
Use plastic sheeting to control moisture in your crawlspace. We use foil-faced rigid insulation to keep the space under the house dry. The plastic and the insulation will eliminate any moisture problems you have in the crawlspace, such as water droplets collecting on the concrete walls and pipes.
What mil plastic goes under concrete?
The most commonly used vapor barrier under concrete slabs is polyethylene (poly) plastic sheeting with a thickness of 10 mil or 15 mil.
How much does it cost to cover a crawl space with plastic?
Total costs, including supplies and professional labor, range from $1,500 to $15,000. Overall price will vary based on factors like the size and condition of the crawl space, contractor rates, and materials used. Some encapsulation systems simply consist of a thin, single-layer plastic liner.
What is 10 mil vapor barrier?
The Stego Wrap Class A 10-Mil Vapor Retarder is an economical vapor protection option for projects not requiring 0.01 or less permeance, while still exceeding performance requirements of ASTM E1745 Class A. Its many features include: Excellent puncture resistance. Helps shield from soil gases such as methane and radon.
Should my crawl space be vented?
Building codes generally require working vents in the crawlspace to allow outside air to circulate under the floor in the summer to prevent moisture buildup that, among mildew and mold, encourages wood rot.
Can I use any plastic for vapor barrier?
Plastic, specifically 6-mil polyethylene plastic, is the most commonly used vapor barrier. Plastic has a very low permeability rating, which means water, in its gaseous or liquid state, does not travel through it.
Do you need a moisture barrier under concrete?
You’ll typically need a vapor barrier if you’re installing flooring over concrete. Therefore, in high-humidity areas, moisture will move to a relatively low-humidity area, even through concrete. This way you can stop the vapor drive of water upward to your floors, protecting them from any damage (source).
Can plastic be used as a vapor barrier?
What mil plastic to use for greenhouse?
One other type of plastic which is used occasionally for greenhouse plastic is polyvinyl chloride (PVC). This is the same plastic used to make pipes. While this plastic is extremely durable, it’s also generally only available in shorter lengths than polyethylene sheeting, and it costs significantly more.
What are the best materials for a crawl space floor?
Wood. Wood floors and engineered wood flooring do not perform well in the presence of moisture.
What is the best crawl space vapor barrier?
The first type and the most popular crawl space vapor barrier is the reinforced polyethylene plastic film. This engineered plastic film is the most widely used and the most durable, offering the longest service life and dollar for dollar your best value.
How do I seal a crawl space?
The first step when you want to seal a crawl space is to repair any existing leaks and seal cracks or holes where insects or water could enter. Areas around plumbing and electrical lines, air vents, ductwork, and cracks in the foundation should be sealed with caulk and expandable foam.