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Crawl Space Vapor Barrier


Crawl space vapor barriers that look like a roll of regular old plastic sheeting aren’t something that people don’t generally discuss at backyard barbeques! For most home owners, the thought of buying plastic sheeting only comes to mind when they about ready to start that long awaited home improvement project and they want to protect their floors, furniture, countertops and other valuable things around the house. One thing that never really comes to mind is buying plastic sheeting also called, crawl space vapor barriers, to protect the most important thing in their home; their health.

True or False: The Surgeon General has warned that smoking is the second leading cause of lung cancer in the United States today. (False- radon is the second leading cause of lung cancer in the U.S. today).

Every day tiny radioactive radon gas molecules migrate through many homes across the county. Depending on what part of the country you live in really makes a difference. Unfortunately we can’t smell, taste or know that those stealth radon gas molecules can be causing long term health problems for us. Radon is a cancer causing radioactive gas that naturally occurs from uranium deposits decomposing in the ground. The Surgeon General has warned that radon is the second leading cause of lung cancer in the United States today.http://www.surgeongeneral.gov/news/2005/01/sg01132005.html The U.S. Environmental Protection Agency and the Surgeon General’s Office have estimated that as many as 20,000 lung cancer deaths are caused each year by radon.

True or false: An elementary school student that spends 8 hours per day and 180 days per year in a classroom with 4 pCi/l of radon will receive nearly 10 times as much radiation as the Nuclear Regulatory Commission allows at the edge of a nuclear power plant. (true)

Most U.S. EPA lifetime safety standards for carcinogens are established based on a 1 in 100,000 risk of death.

True or False: Most scientists agree that the risk of death for radon at 4 pCi/l is approximately 1 in 100.


So what can you do to protect your home from Radon gas? First of all you should test your home to see if you have high levels of radon. The US EPA, Surgeon General, American Lung Association, American Medical Association, andNational Safety Council recommend testing your home for radon because testing is the only way to know your home's radon levels. There are no immediate symptoms that will alert you to the presence of radon. It typically takes years of exposure before any problems surface.

Is there a crawl space vapor barrier that can combat deadly radon?

For many years homeowners and contractors alike have chosen to just use 6 mil plastic from the local hardware store with a radon mitigation system that blows the gas away from the home to lower radon levels. However, what most people don’t know is that is not all crawl space vapor barriers are equal and that the plastic sheeting liner they bought from the their local hardware store or that the contractor is not meant to block out any type of gases. Over time the radon gas that is not being vented out will slowly build back up in your home.

There is a life saving solution! Six years ago a revolutionary product was introduced called Vapor Block Plus 20. Vapor Block Plus 20 is the first and still the only product on the market proven to block out radon gases along with water vapor that can cause mold over time which also can lead to many respiratory issues as well.

Vapor Block Plus 20 from Raven Industires is a seven-layer co-extruded barrier made from state-of-the-art polyethylene and EVOH resins to provide unmatched impact strength as well as superior resistance to gas and moisture transmission. Vapor Block Plus 20 is a highly resilient under slab, vertical wall barrier, and crawlspace vapor barrier designed to restrict naturally occurring gases such as radon and/or methane from migrating through the ground and concrete slab. Vapor Block Plus 20 is more than 100 times less permeable than typical high-performance polyethylene vapor retarders against Methane, Radon and other harmful VOCs.

Many plastic companies and contractors will claim that the plastic they offer will protect you against radon so please ask questions:

Ask to see data sheet on the plastic.

Look for Radon Diffusion Coefficient test data on the data sheet. (If this is not listed then the product has not been tested to block out radon)

Also stand firm. Don’t let anyone talk to you into something you know isn’t right. Remember it does not matter how much experience a company says they have with mitigating Radon. You must insist on seeing the data sheet. When it comes to your health you must use the crawl space vapor barrier that is proven to block those hazardous gases.

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