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Crawl Space Door Systems, Inc.
5741 Bayside Road #105
Virginia Beach, VA 23455
Mon - Fri 8a.m. - 4p.m.

Vapor Barrier

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Vapor Barrier


  • 10 Mil Non-Reinforced available
  • 10 Mil – Non-reinforced White – Pro Crawl Barrier – Americover brand – 10′ x 100′ – Great for encapsulation or as a crawlspace ground liner. We are huge fans of the 10 mil. super easy to work with and tough.

Vapor Barrier puts a barrier between moisture and the sub-floor of your home

What is a Crawl Space Vapor Barrier and when would I use one?

Vapor barrier is also known as poly or moisture barrier. Most building codes now require vapor barrier in the crawlspace. 40% of moisture comes from the ground. Therefore, the plastic is putting a barrier between the moisture that comes from the earth and the sub floor of your home. Poly is intended to retard the migration of moisture in your crawlspace.

What does Mil stand for and what’s the difference between them? What does reinforced mean?

Any vapor barrier that is not reinforced refers to the thickness of the plastic. Anything that is reinforced beyond 12 mil refers to the thickness of the fiber and material.

Vapor Barrier Accessories

Vapor Barrier Stakes mean less work to keep the vapor barrier from moving during install versus using common insulation stakes/tiger teeth.

Use Butyl Tape and Christmas Tree Fasteners if you are encapsulating and bringing the vapor retarder up the wall or pillars.

Use Capped Vapor Barrier Stakes for a finished look and easier installation of the stakes. The Buttons are great for helping pound the stakes with a rubber mallet.


Contact our Warehouse

5741 Bayside Road #105
Virginia Beach, VA 23455
Mon – Fri 8a.m. – 4p.m.


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