The YCS 20 Mil Reinforced Crawl Space Vapor Barrier is a heavy-duty ground liner designed for professional crawl space encapsulation projects.
The material uses reinforced polyethylene construction and a white coating, providing contractors with a durable vapor-control layer for sealed crawl spaces and related applications.
The 20 mil liner is classified under ASTM E1745 as Class A, B, and C and has a documented water vapor transmission value of 0.011 gr/h-ft². Its published index puncture result is greater than 500 N.
A 20 mil reinforced liner may be considered for crawl space projects where contractors want a heavier ground barrier as part of the encapsulation system.
Product selection should take into account factors such as:
The appropriate liner should be selected based on the project conditions rather than mil thickness alone.
The YCS 20 Mil Vapor Barrier is part of a reinforced polyethylene liner system used as a vapor-retarder material.
The supporting product documentation identifies the material as polyethylene and describes applications that include geomembrane and vapor-retarder use. Under recommended or normal use, the document classifies the material as non-hazardous.
| Specification | Published Value |
| Total Thickness | 20 mil |
| Reinforcement | 100% reinforced |
| Coating Color | White |
| Index Puncture | >500 N |
| Classification | ASTM E1745 — A, B, C |
| Water Vapor Transmission | 0.011 gr/h-ft² |
| Surface Burning Characteristics | Class A |
| SKU | YCS-2075144NL |
7 Crawl Space Vapor Barrier Installation Mistakes Contractors Should Avoid
Everything You Need for Confident, Code-Compliant Installation
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