This Lancaster, VA homeowner has several improvements happening in their crawl space. Installing a new CleanSpace Vapor Barrier (aka moisture barrier or crawl space liner) is just one piece of that, but a very importiant one.
This 7 ply, poly string-reinforced vapor barrier is combined with a 4-inch wide liner tape that seals the crawl space off from the earth's moisture. The product is durable enough to withstand servicepersons crawling around in your crawl space without worry of it becoming detached or torn.