A crawl space vapor barrier is a heavy-duty moisture control membrane designed to block ground vapor from entering the crawl space and home above. Installed over exposed soil and sealed at seams and walls, it helps prevent moisture intrusion, mold growth, wood rot, odors, and structural deterioration. Vapor barriers are a core component of crawl space encapsulation systems used by both professionals and DIY installers.

Key Features

• Moisture & Vapor Protection
  Creates a continuous barrier that reduces ground moisture and humidity migration into the crawl space.

• Durable Construction
  Made from reinforced polyethylene (woven or non-woven options) for improved tear and puncture resistance compared to standard plastic sheeting.

• Encapsulation-Ready
  Designed to be taped and sealed to walls, piers, and seams for airtight, long-term performance.

• Clean, Bright Finish
  White surface improves visibility during installation and ongoing inspections.

• Multiple Thickness Options
  Available in various mil ratings (commonly 6–20 mil) to match project needs, foot traffic, and durability requirements.