DELTA®-MS - Below-grade Dimpled Membrane

The Foundation Protection System that Keeps Basements Dry

Protecting your foundations from water and moisture is critical. DELTA®-MS is a dimpled membrane that uses our exclusive Air-gap Technology to ensure your basements stay dry and last longer. 

Long-lasting Moisture Protection, Long-lasting Satisfaction

The vacuum-formed dimpled pattern creates an air gap between the membrane and the foundation, allowing water to drain. By keeping water away from the foundation wall, DELTA®-MS is able to keep basements permanently dry and protected. Unlike sprays, which crack when concrete walls crack, it bridges cracks so no water intrusions can occur. This dampproofing helps ensure more comfortable and healthier living spaces for your homeowners; better efficiency and durability for your buildings; and fewer warranty claims and call-backs for you.

The Most Durable Dimpled Membrane on the Market 

Made from 60% recycled and 40% virgin materials, the co-extrusion process and offset dimples of DELTA®-MS create higher compressive strength and impact resistance, ensuring its performance and protection last longer, especially when compared to other membranes typically made from 100% recycled materials and sprays.

Faster Installation, Better Protection

Unlike sprays, DELTA®-MS doesn’t require specialized safety equipment and you don’t have to wait around for the concrete to cure or the fumes to dissipate so installation can be faster, easier, and more cost effective. The extensive DELTA® Academy Certified-Installer Program helps ensure materials are properly applied, allowing you to provide an industry-leading warranty. 

Installation and Best Practices for DELTA®-MS

Product Details
Product Benefits
  • Dimpled membrane made from high-density polyethylene (HDPE) 
  • A co-extruded product – 60% recycled HDPE and 40% virgin HDPE
  • Virgin HDPE outside layer and recycled HDPE core make it the most durable dimpled membrane on the market
  • Vacuum-formed dimpled pattern allows incidental water to flow into footing drain
  • Available in many sizes for easy installation on various foundation heights

  • Impermeable to water and water vapor, keeping basements dry
  • Meets all building code requirements in the USA and Canada
  • Two lines of defense against water intrusion: dimpled membrane provides capillary break; air-gap allows incidental water to freely drain by gravity
  • Eliminates interior dampness and musty odors
  • Reliably bridges foundation cracks and deflects soil moisture, unlike asphaltic sprays
  • Continues to function even if foundation shifts or cracks
  • No unpleasant chemical odors or harmful VOCs
  • Resists damage from backfill, like rocks and debris 
  • Installs in all types of weather
  • Declare Label: Red List Free

Related Accessories

  • DELTA®-FAST'ner Multi-Stud Fastener

    DELTA®-FAST'ner Multi-Stud Fastener

    A multi-stud membrane fastener, DELTA®-FAST'ner provides superior holding power and prevents tear-out in your high-performance membranes.
  • DELTA®-FLASH Polyethylene Angled Flashing

    DELTA®-FLASH Polyethylene Angled Flashing

    Used with DELTA®-MS, DELTA®-FLASH is an angled flashing used to finish installation. Made of impact-resistant recycled polyethylene.
  • DELTA®-GRIP FASTENER for Waterproofing Membranes

    DELTA®-GRIP FASTENER for Waterproofing Membranes

    DELTA®-GRIP FASTENER has a self-adhesive backing and effectively secures DELTA®-MS, DELTA®-DRAIN, and all DELTA® drainage composites.
  • DELTA®-MOLD STRIP for Membrane Installation

    DELTA®-MOLD STRIP for Membrane Installation

    Use DELTA®-MOLD STRIP to finish installation of DELTA®-MS and DELTA®-DRAIN. Use around windows, doors, or grade changes in the foundation.
  • DELTA®-SEALANT Elastic Sealing Compound

    DELTA®-SEALANT Elastic Sealing Compound

    Use DELTA®-SEALANT when installing DELTA®-MS and DELTA®-DRAIN to seal any gaps in the membrane created at corners where a tight fit isn’t possible.
  • DELTA®-TERMINATION BAR Membrane Accessory

    DELTA®-TERMINATION BAR Membrane Accessory

    DELTA®-TERMINATION BAR works to stop debris from clogging the air-gap drainage behind the membrane. Use with DELTA®-MS.