Crawl Space Moisture Barriers Information

Wally and Floora Say:

Male Avatar with yellow helmet

Wally Says:

Floora did you know, protecting your home starts from the ground up. Our crawl space moisture barriers are designed to prevent moisture infiltration, which can lead to mold growth, wood rot, and compromised structural integrity. Ideal for homeowners, builders, and contractors, these barriers provide an essential layer of protection, ensuring a dry and healthy foundation for any property.

Here’s what to consider when selecting a crawl space moisture barrier for your needs:

  • Material Strength and Permeability: Our barriers are made from high-quality, durable materials like polyethylene or reinforced poly, designed to resist tears and punctures while providing an impermeable layer against moisture.
  • Thickness: Barrier thickness ranges from 6 mil to 20 mil. Thicker barriers offer better durability and moisture protection, ideal for areas with high humidity or water tables.
  • Coverage Area: Measure your crawl space to ensure you select a barrier with adequate size to cover the entire area, including walls and piers for comprehensive protection.
  • Installation Accessories: Consider the necessary accessories for a secure installation, such as seam tape, stakes, or butyl tape, ensuring a completely sealed and effective moisture barrier.

Buying Tip: For environments prone to flooding or severe moisture, opt for a heavier, more durable barrier and consider professional installation to ensure maximum protection and longevity.

Female Avatar with brown hair

Floora Says:

Thanks you Wally but also keep in mind that installing a crawl space moisture barrier is a proactive step toward maintaining your home’s value and health. Here’s how to achieve the best results:


  • Surface Preparation: Start with a clean, debris-free crawl space. Smooth out sharp rocks or objects that could puncture the barrier.
  • Proper Overlap: When laying out the barrier, overlap seams by at least 12 inches to ensure no gaps for moisture to penetrate, securing overlaps with seam tape.
  • Secure to Foundation Walls: Extend and secure the barrier up the crawl space walls to create a fully encapsulated space, preventing moisture from entering through the sides.
  • Regular Inspection: Periodically check the barrier for damage or displacement, making repairs as needed to maintain its integrity and effectiveness.

Buying Tip: Don’t forget to address other moisture sources by ensuring proper exterior drainage and possibly installing a dehumidifier in the crawl space for optimal humidity control. Need a sump pump upgrade? We’ve got you covered!