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20 Mil Crawl Space Moisture Barrier
  • 20 Mil Crawl Space Moisture Barrier
  • Crawl Space Vapor Barrier
  • 20 Mil Crawl Space Encapsulation
  • 20 Mil Crawl Space Liner
  • 20 Mil Crawl Space Plastic
  • Crawl Space Insulation
  • Foundation Pins™
  • Foundation Pins™
  • Crawl Space Foundation Pins™ - FP-
  • Foundation Seal Tape™
  • Foundation Seal Tape™ - FST-100
  • Waterproof Pro Seam Tape™  - WST-PRO
Sale!

The SilverBack™ is an actual thickness crawl space vapor barrier that is roughly 30% thicker than other "20 mil" products. This is the premium quality 20 Mil SilverBack™ crawl space vapor barrier for crawl space encapsulation.

This price includes SHIPPING! (some restrictions apply)

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 visit SilverBack™ Product Page


Price: $349.92
In stock
Availability: In Stock
Ships Next Day or Sooner™
20MSB-50
SIZE:
  • 13


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Quantity:
Item #: 20MSB-50
Availability: In Stock
Ships Next Day or Sooner™
Item # Description/Size Availability Qty Break Price Quantity
FP-
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 $7.61 $5.80
THR-PRO
Crawl space moisture meter, reads RH% and air temp
Sold Out 1 $18.99

20 Mil Reinforced Vapor Barrier for Crawl Space Encapsulation

The 20 Mil SilverBack™ is made from 100% virgin polyethylene resin and reinforced with a 1000 denier polyester cord. This crawl space vapor barrier is idea for use on the crawl space floor because it is an actual 20 mil. We say it is an actual 20 mil because it is measured at the plastic and not across the raised reinforcement threads like other brands are. This makes the SilverBack™ 20 Mil 30% thicker than the competitors 20 mil.

Comparing product weights the 20 Mil SilverBack™ comes in at 110 pounds per 1000 square feet of product or 110 MSF while the closest competitor's 20 Mil is only 83 MSF and another 74 MSF.

The SilverBack™ brand is Made in America and does not contain unnecessary additives. There is no odor or off-gassing with this crawl space floor liner.

Apperance

The SilverBack™ is easly identified by it's bright white face and silver colored back.

The 20 Mil SilverBack™ is available in 3 roll sizes:

  • 6'9"x100' (675 sq ft) No welds or seams
  • 13'4"x50' (675 sq ft) One weld/seam
  • 13'4"x90' (1200 sq ft) One weld/seam

Use

20 Mil SilverBack™ is thick enough and strong enough to allow for medium to heavy storage, heavily traveled areas and to cover stone/concrete floors. We still recommend the use of the Felt550™ if the floor has objects that are sharp and can not be removed.
Use the 20 Mil SilverBack™ on the floor and the 12 Mil SilverBack™ on the walls to keep the costs inside the budget.
20 Mil= .020 inches

The 20 Mil SilverBack roll size is approximately 86" for all three roll sizes. We take the wider rolls and fold them in half before rolling them on a thick cardboard core. This 20 Mil product will measure at least 20 mil (.020 inches) at the center of the diamond pattern and approximately 26 mil at the string reinforcement.

Expect that these rolls are heavy and may need two people to carry them, especially the 90' roll size (145 pounds). Due to its large size, UPS charges a large package handling fee of $9.28 each to deliver to your door.

Overall Customer Rating of 81 Reviews:
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Southwestern Pennsylvania

Large DIY Crawlspace Project

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Pros:
  • High quality
  • great value
  • durable
Cons:
  • None
I have a space that is approximately 1,000 square feet in area and 5 feet in height. I wanted to use this space for general storage and storage of lawn equipment, so I needed a product to accommodate that. The floor was originally dirt which I leveled adding an average of 3 inches of 1B limestone to bring the floor up to the footer elevation. Based on recommendations from CrawlSpace Repair.com, I covered the limestone and footer with Felt 550 as an underlayment then finished with the 20 mil Silverback with string reinforcement. I ran the Silverback up the walls approximately 6 inches and secured it to the walls with Premium Encapsulation Caulking. I used the Waterproof ProSeam Tape on all seams following the proper installation procedures provided in the company videos. Finally, I attached one circulation fan to the ceiling and plugged it into a timer to promote air circulation. I no longer need a dehumidifier. The space is clean, dry and holds up to heavy foot and equipment traffic. I am extremely pleased with the products and the result.

Florida

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High quality and strong product. Very pleased with it.

Dinwiddie, VA

2400 square foot DIY encapsulation

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Pros:
  • saved a ton $$$$
  • Excellent customer service
Cons:
Took on a 2400 Square foot encapsulation of my homes crawlspace. Was overwhelming at first but the material quote and outstanding assistance from Larry took majority of the guess work out. Went with 12 mil silverback reinforced poly for the walls and pillars and 20 mil silverback reinforced poly for the floors. 90 pint dehumidifier and pump. Material quote was spot on with just enough material for the job. Entire job took 2 months working at my leisure with the help of my father. Wood moisture readings previous to encapsulation were 18-25% with humidity readings of 80-85% . Wood readings post encapsulation are now as low as 6% some places and cant find a reading over 15% anywhere. Humidity is now steady at 53% with the dehumidifier cycling on and off. Highly recommend fan kit to improve dehumidifier efficiency. This job is not for a first time DIY person but someone with average skills can be successful. I saved about $15,000 by doing this job myself.

Atlanta, Ga

20 Mil Silverback

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I used this 20 mil Silverback on the floor of our crawl space due to the excessive rocks. It was the perfect choice as it is tough and won't wear through. The folks at CrawlSpaceRepair.com did an excellent job of guiding me through the installation process. Very easy.

Gunner insulation

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Product is great to work with and is much better then the old 6mill
Makes for a much better job