Crawl Space Vapor Barrier
Crawl Space Protection Built Like The Pros Demand
Contractor-grade cross-woven vapor barriers in true 12, 16 & 20 Mil. Manufacturer-direct pricing, 12-foot-wide rolls, and real puncture resistance that lasts the life of the home.
Why it wins
Real numbers. Not marketing speak.
Every Liner Guys barrier is engineered to outlast the home it protects, and to install faster on the job.
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Bulk Pricing
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Why it wins
Why cross-woven beats flat poly
Standard sheeting tears the moment it catches a rock or a nail. Our reinforced cross-woven structure spreads the load across thousands of fibers — so it holds.
A tight cross-weave grid resists punctures and stops tears from spreading across the barrier.
Layered polyethylene creates an impermeable seal against moisture and soil gases — not just a cover.
Maintains structural integrity through humidity, temperature swings and years of ground contact.
The Liner Guys VS. Other Brands
The difference between protecting your home's health & value — and risking it.
| Feature | Liner Guys | Other Brands |
|---|---|---|
| Thickness | True & consistent mil | Thin & inconsistent |
| Puncture resistance | Unrivaled — cross-woven | Low — prone to tear & fray |
| Protection lifespan | Permanent, lifelong | Short-term |
| Moisture & radon seal | Full moisture & radon block | Inferior moisture seal |
| Installation | Easy, flat, fewer seams | Difficult & wrinkled |
| Grade & trust | Professional grade | Consumer grade basic |
Why it wins
Whether you install them or live above them
The same pro-grade barrier — positioned for how you'll use it.
Contractors
Spec a barrier that won't call you back. Consistent mil, fewer seams and a finish your crews can lay fast and flat every job.
Builders
Manufacturer-direct supply you can standardize across communities. Class A material that protects the homes and your warranty.
Encapsulation Pros
Permanent-grade liners engineered for full encapsulation systems, radon block, puncture resistance and long-term integrity.
A drier, healthier home
Stop ground moisture, mildew and musty air at the source. Cleaner air upstairs and a foundation that stays sound.
Lower energy bills
A sealed crawl space means less humidity for your HVAC to fight — a more efficient, more comfortable home year-round.
DIY-friendly & built to last
Wide rolls that lay flat make it a manageable weekend project — with professional-grade protection that lasts decades.
Frequently Asked Questions
Which mil thickness do I need?
For standard residential crawl spaces, the 12 Mil is the proven workhorse. Step up to 16 Mil for high-traffic areas or rough terrain where you want extra puncture resistance, and choose 20 Mil for permanent, extreme-duty encapsulation systems and maximum radon protection. All three options come in the same 12 ft × 100 ft roll.
Why a 12-foot-wide roll?
A wider roll means fewer seams across the crawl space, resulting in faster installation, fewer potential weak points, and a cleaner, flatter finish. One roll covers 1,200 sq ft.
Does it actually block radon?
Yes. Our reinforced cross-woven barriers are engineered to block ground moisture, humidity, and soil gases, including radon, helping protect indoor air quality and your foundation's long-term integrity. The 20 Mil option offers our highest level of protection.
Can I use it beyond crawl spaces?
Absolutely. The same reinforced sheeting can be used as a sub-slab vapor barrier, for concrete curing, construction-site and equipment covering, agricultural applications, and heavy-duty jobsite containment.
Do you offer contractor or bulk pricing?
Yes. As a direct manufacturer, we offer volume pricing for crews and builders, as well as white-label and private-label programs. Use the Bulk & Trade section above or call (305) 842-9079.
