The Problems

Without a proper drainage system, water can damage virtually any construction project. An improper waterproofing system can allow hydrostatic pressure to build, making any crack in the foundation an access for water damage.  

The Solution

DELTA®-DRAIN is a highly effective drainboard that controls the flow of below-grade water, taking it out and away from the foundation. Its high water-flow capacity ensures effective drainage. DELTA®-DRAIN is suitable for almost any application in residential and light commercial construction. 

Product Details
Product Benefits
  • 2-layer dimpled membrane
  • Composed of special High-Density Polyethylene (HDPE) and PP non-woven TYPAR® geotextile
  • Middle layer is manufactured with an exclusive co-extrusion process, utilizing 60% recycled HDPE
  • Two thin outer layers are composed of a specific grade of virgin HDPE 
  • Outstanding compressive strength and impact resistance
  • HDPE drainage core allows incoming water to freely drain to the footing perimeter
  • Dimple pattern provides high compressive strength and acts as a highly effective protection layer for the waterproofing material during backfill
  • Heat-bonded polypropylene geotextile is securely bonded to dimple crowns by a thermal process for lasting durability and performance, and provides superb filtering performance
  • The geotextile is rot-proof, highly water permeable, and prevents clogging of the flow passages in the drainage core. The result: continuous drainage of incoming water to the footing perimeter
  • Composed of 60% recycled HDPE, the product is environmentally friendly
  • Two thin outer layers, composed of virgin HDPE, protect the recycled HDPE from polymer degradation caused by oxidation and environmental influences like acidic soils or alkalinity (concrete)
  • Stabilized against chemical and environmental stress cracking
  • Tough and durable, the dimpled sheet can endure the rigors of jobsite installation
  • Available in 6' and 8' wide rolls – the largest size drainboard available on the market today, making installation quick and easy

Architectural Details

Guide Specifications

Installation Guides

Product Details

Safety Data Sheets

Technical Data

Related Accessories

  • DELTA®-FAST'ner


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


    DELTA®-GRIP FASTENER has a self-adhesive backing and effectively secures DELTA®-MS, DELTA®-DRAIN, and all DELTA® drainage composites.


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


    DELTA®-SCREW FASTENERS work to fix drain boards to perimeter insulating boards without penetrating your waterproof membrane. Ideally used with DELTA®-DRAIN.


    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.