StegoCrawl® Wrap 20-Mil Reinforced Vapor Retarder 12' x 100' (1,200 sq ft)
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- Ships via palletized freight (LTL): Due to its size, the product is shipped on a pallet
For the toughest crawl space and moisture-control jobs, StegoCrawl® Wrap 20-Mil Reinforced Vapor Retarder delivers maximum puncture resistance and industry-leading low permeance in a single heavy-duty membrane. Built with a multi-layered construction — high-strength scrim reinforcement bonded between two layers of virgin polyethylene film — this vapor barrier is engineered to outperform on demanding jobsites where standard films fall short.
Ideal for new construction or retrofit crawl space encapsulation, soil-gas and radon mitigation systems, and heavy-duty temporary enclosure or containment applications, StegoCrawl Wrap 20-Mil combines exceptional strength with a Class I vapor rating that exceeds ASTM E1745 requirements. Added UV inhibitors and thermal stabilizers extend its usefulness to outdoor jobsite applications as well.
Why Choose StegoCrawl Wrap 20-Mil Reinforced?
- Ultra-Low Permeance – Tested to ASTM F1249 at just 0.013 perms, Class I — among the lowest permeance ratings in the StegoCrawl line
- Exceptional Puncture Resistance – 247 N puncture rating (ASTM D4833), over 3x stronger than the 6-mil version, for rugged jobsite durability
- High Impact Resistance – Withstands 1,361 grams (ASTM D1709) of free-falling dart impact without failure
- Superior Tensile Strength – MD 53.9 lbf/in / TD 55.7 lbf/in with high elongation (MD 844% / TD 911%) for flexibility under stress
- Diagonal Reinforcement – Scrim-reinforced design helps prevent tears from spreading during install or over time
- Opaque White Finish – Brightens the crawl space and improves visibility for inspections
- UV & Thermal Stabilized – Rated for demanding outdoor use beyond crawl space applications
- Made in the USA – Manufactured with US and global materials, zero VOCs
- Life of the Building™ Warranty* – Backed by Stego Industries' confidence in long-term performance (*crawl space applications only)
Specifications
| Property | Result |
|---|---|
| Thickness | 20 mil |
| Water Vapor Permeance | 0.013 perms (Class I) |
| Puncture Resistance | 247 N |
| Impact Resistance | 1,361 grams |
| Tensile Strength (MD/TD) | 53.9 / 55.7 lbf/in |
| Tensile Elongation (MD/TD) | 844% / 911% |
| Weight | 100.6 lbs/MSF |
| Roll Size | 12' x 100' (1,200 sq ft) |
| Roll Weight | ~128 lbs |
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About Radon
What is Radon?
Radon is a radioactive gas formed from the decay of uranium in soil and rock.
It moves from the ground into homes in enclosed spaces like basements.
Health Risks Associated with Radon
Radon is the second leading cause of lung cancer after smoking.
Radon exposure is typically asymptomatic, meaning there are no immediate signs of illness.
How to Mitigate Radon Exposure
After identifying radon issues with accurate testing, you need to install mitigation systems.
If you need help identifying the best system or risks, we'll help you for free.