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20 Mil Crawl Space Moisture Barrier
  • 20 Mil Crawl Space Moisture Barrier
  • 20 Mil Crawl Space Encapsulation
  • Crawl Space insulation liner
  • 20 Mil Crawl Space Quality Liner
  • Foundation Pins™
  • Foundation Pins™
  • Crawl Space Foundation Pins™ - FP-100
  • Foundation Seal Tape™
  • Foundation Seal Tape™ - FST-100
  • Waterproof Pro Seam Tape™  - WST-PRO
  • Waterproof Pro Seam Tape™  - WST-PRO
  • Waterproof Pro Seam Tape™  - WST-PRO
Spotlight!
Sale!

Compare our 20 Mil GuardianLiner™ to the 20 Mil Cleanspace™ brand liner, see specs below. This is an American Made crawl space liner with added anti-microbial for additional piece of mind in suppressing mold and mildew growth. 13'4"x75', 1000 Sq Ft per roll.

This product is subject to a UPS large package handling fee of $9.28 for the first roll of each vapor barrier kind/size.

For more information on this product visit the GuardianLiner™ Product Page


Retail: $486.21
Price: $375.02
In stock
    Availability: In Stock
    Ships Next Day or Sooner™
    20MGL-75
    SIZE:


    Update price
    Quantity:
    Item #: 20MGL-75
    Availability: In Stock
    Ships Next Day or Sooner™
    Item # Description/Size Availability Qty Break Price Quantity
    FP-100
    Plastic fasteners to hold the vapor barrier permanently to the foundation wall
    In Stock 1 $19.99 $18.99
    FST-100
    Super tacky moisture gasket for sealing the vapor barrier to the foundation wall. Does not stick to damp foundations and requires FP-100 to work properly.
    In Stock 32+
    $24.99
    WST-PRO
    Made with our proprietary adhesive, this seam tape is waterproof and matches our barriers exactly. The Waterproof Pro Seam Tape™ is the tougher, stronger, and more durable choice for your crawl space encapsulation.
    In Stock 12 - 23
    24+
    $30.99
    $30.99
    CF1-URE
    Premium polyurethane caulk for sealing the vapor barrier to the foundation wall in wet locations
    In Stock 1 $6.20 $5.80
    THR-PRO
    Crawl space moisture meter, reads RH% and air temp
    Sold Out 1 $18.99

    Compare the 20 Mil GuardianLiner™ to CleanSpace™-

    Same amount of plastic and same thickness...

    Looking for an affordable crawl space liner in the 20 mil class? The GuardianLiner™ is a vapor barrier designed to match up in appearance and performance with the Cleanspace brand head to head. Although lengths and widths are different the barrier's formula is comparable.

    Both product's outer layers are made from 100% virgin polyethylene resin and reinforced with a 1000 denier polyester cord. They even have very similar weights, with the GaurdianLiner™ made with 85 MSF and Cleanspace made with 83MSF. MSF= Pounds of plastic per square foot of product.

    Although products like these naturally resist mold and mildew growth they both have an added anti-microbial to enhance this characteristic.

    If you are looking for an alternative to the high priced Cleanspace brand crawl space liner, look no further than the 20 Mil GuardianLiner™.

    The 20 Mil GuardianLiner™ is made right here in America. That means you get consistent quality and appearance.

    13'4"x75', 1000 Sq Ft per roll.

    Both 20 Mil CleanSpace and 20 Mil GuardianLiner measure 20 Mil at the top of the thread. If your are looking for a 20 Mil vapor barrier that is measured at the plastic take a look at our actual thickness, 20 Mil SilverBack™.


    Overall Customer Rating of 14 Reviews:

    20 mil guardianliner

    Durability:
    Quality:
    Recommend:
    Pros:
    • ease of installation
    Cons:
    great product just wish when rolled from manufacture that there were no creases.all the materials i received were of top quality and easy to place. just one word of caution, buy the felt backer also. i placed mine on 1/8th" limestone chip and it seems like it could poke through the liner. but all in all great product.

    Hendersonville, TN

    Encapsulation project a success

    Durability:
    Quality:
    Recommend:
    Pros:
    Cons:
    My husband and I just completed our crawlspace encapsulation project using the 20ml Guardian Vapor Barrier from this website. It was a grueling job (not recommended for 58 and 60-year-olds) but we got it done. It took several weekends some weeknights, but well worth it. Humidity has already dropped 35%. Our next step is installing air ventilation system then we feel our foundation will be secure. A tip I would offer is to consider coverage of your crawlspace walls when ordering materials. Our house is about 1800 sq feet so I ordered two 1,000 sf rolls, but because of all the wall space and support pillars that needed to be covered I ended up needing to order an additional 1,000 sf roll to finish the project. So glad it's done!

    Excellent product!

    Durability:
    Quality:
    Recommend:
    Pros:
    • Professional
    Cons:
    I'm a contractor in Pagosa Springs CO. I have now encapsulated 3 crawlspaces with Guardian liner and other products from crawlspace repair. I couldn't be happier with the products, the instructional videos, (gave me the ability to do a professional job from the beginning) and the fast efficient service. My only complaint, they sent me a 2x tee shirt, I'm a large. Lol

    Durable Vapor Barrier

    Durability:
    Quality:
    Recommend:
    Pros:
    Cons:
    This is a very nice liner that helps create a quality vapor barrier. Will purchase again for the next crawl space encapsulation I sell. Also, product came quick and this company has great customer service.

    Need better shipping cover

    Durability:
    Quality:
    Recommend:
    Pros:
    Cons:
    Very good product, only thing it should be shipped in cardboard had a couple holes in lost 3 feet, from ship other than that good stuff