Whitecap Dimple Drainage Matting, 2′ x 50′ – Improves Water Movement and Drainage – Waterproof Moisture Barrier Foundation Wrap and Floor Underlayment – Sub Floor Waterproof Membrane

Description

Crawlspace Premium Drainage Matting is an essential component for any crawl space or basement encapsulation project. At 25 mil thickness, it protects your vapor barrier liner from punctures and wear, and when paired with a 20 mil Whitecap reinforced liner, provides a total of 45 mils of reliable protection. The dimpled design channels moisture efficiently toward footer drains, reducing standing water and supporting radon mitigation systems by promoting airflow beneath the liner.

Made from high-density polyethylene (HDPE), the matting resists hydrostatic pressure and remains flexible in cold conditions. The vertical and horizontal alignment of the dimples creates air chambers that enhance drainage while protecting the liner. This durable, recycled-content product meets or exceeds ICC-AC114 standards for below-grade damp proofing, rigid polyethylene, and wall waterproofing, making it a long-lasting, eco-friendly solution for healthier, drier crawl spaces.

Installation Tips & Best Practices

To get the most out of the matting, follow these guidelines:

1. Start with a clean, leveled ground surface (remove sharp stones, roots, and debris).
2. Roll out the matting across the floor or along the base of walls. Overlap seams so water can’t bypass the barrier.
3. Slope runs toward your sump pump or footer drain system to guide moisture out.
4. Once the matting is in place, install your vapor barrier liner on top, sealing seams and anchoring edges.
   

Because of its flexibility and manageable weight, the matting can be positioned easily in tight crawl space areas without special tools.

FAQs

Is this drainage matting durable enough for heavy compression?
Yes. The Crawl Space Premium Drainage Matting is made of HDPE with high compression resistance (e.g. 729 lbs/in), which helps it withstand pressure from soil, foot traffic, or stored items without collapsing.

Will drainage matting help with moisture, mold, and musty smells?
Yes. By providing a path for moisture to escape instead of pooling beneath your liner, the mat reduces standing water, lowers humidity, and helps discourage mold, mildew, and musty odors in your crawl space.

How long will drainage matting last under my crawl space liner?
If properly installed and protected, HDPE drainage matting can last for decades. It resists degradation from moisture, soil, and compression, making it a long-term component of a quality encapsulation system.