Crawl Space Encapsulation Supplies

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All of our crawl space vapor barriers and liners are authentic Crawl Space Encapsulation® products

12 Mil is a measured of thickness and used in the plastic vapor barrier industry. 12 Mil is equivalent to .012 inches.

12 Mil crawl space vapor barriers and liners are the most popular choice for crawl space encapsulation®. Both DIY and professional installers install more 12 mil vapor barrier that any other thickness. The reason 12 mil is so popular is because it offers both durability at a reasonable cost and a wide selection to meet the needs of the crawl space. Often times the home owners need some extra storage and all of our 12 mil vapor barriers offer this feature. 

Today, homeowners and professionals alike have many choices in both thickness and dimensions available to them in vapor barriers and liners for the crawl space. We offer homes with narrow pier spacing all the way up to a wide open space options to limit purchasing more vapor barrier than they need.

GuardianLiner™ & DiamondBack™ 12 Mil vapor barriers are made in America and the SilverBack® HS is made in Canada. All of our vapor barriers for crawl space encapsulation® are made to our high standards and tested by an independent lab before they are sold to you.


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12 Mil Crawl Space Vapor Barrier, GuardianLiner™ crawl space vapor barrier, 12 mil vapor barrier, 12 mil crawl space vapor barrier, 12 Mil Liner
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Retail: $99.00
Price: $81.68
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Crawl Space Repair®

    12 Mil Vapor Barrier GuardianLiner™ Extremely durable, high quality crawl space vapor barrier/liner. This crawl space liner has been a favorite of the professional community since it's introduction. There are three major components that make this liner an excellent choice for the crawl space environment. First, the white top layer and the tan bottom layer are made from 100% virgin polyethylene resin. This is very important because these layers will last indefinitely. Product performance &...

    DiamondBack 12 Mil Vapor Barrier Seamless
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    Retail: $344.16
    Price: $275.10
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    Crawl Space Repair® Item #: 12MDB-85-SL -

      12 Mil DiamondBack This American Made 12 mil crawl space liner is a cord reinforced vapor barrier that can be compared to most other brands on the open market for the same stated thickness, 12 Mil. Actual 12 mil is equal to .012", not 12mm. This product is a nominal 12 mil, meaning does not measure 12 mil at the plastic, but it is close. This crawl space liner does not contain any additives and is reinforced with a 1000 denier polyester cord to stabilize the layers and prevent tearing....

      12 Mil GuardianLiner™ HS (High Strength) Vapor Barrier  crawl space vapor barrier, 12 mil vapor barrier, 12 mil crawl space vapor barrier
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      Retail: $98.12
      Price: $87.70
      Availability: In Stock
      Crawl Space Repair® Item #: 12MGL- -

        NEW Product Technology The GuardianLiner™ HS technology comes from 60 years of outdoor environmental strength testing and is a premium engineered vapor barrier. With 100% of the surface protected by reinforcement made from strengthened polyethylene ribbons. The puncture and tear strength greatly outmatches even our GuardianLiner™ string reinforced vapor barrier product line.  The 12 Mil measures actual 12 Mil across the surface and looks great as wall or floor liner. This crawl space...

        12 Mil GuardianLiner ™ RS (Rough Soil®) 12 mil crawl space vapor barrier, 12 mil vapor barrier, 12 mil crawl space liner
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        Retail: $355.12
        Price: $320.00
        Availability: In Stock
        Item #: 12MGL-RS -

          Available in 12' x 50' rolls 12 Mil GuardianLiner HS™ and Felt 5100™ are attached using molten polyethylene 100% Virgin PolyethyleneBright White FaceGuardianLiner™100% of the surface is Reinforced with Polyethylene ribbons Felt 5100™ -  Protects vapor barrier punctures from sharp objects in the dirt, like gravel and edges of concrete foundationPrevents the vapor barrier from sucking to the mudAllows an air gap between the vapor barrier and the earth to mitigate soil gasses if...