The Problem

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

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 

Related Accessories

  • DELTA®-FAST'ner


    DELTA®-FAST'ner is a multi-stud fastener for the safe attachment of DELTA®-MS and DELTA®-DRAIN to the foundation wall.


    DELTA®-GRIP FASTENER is an installation aid for attachment of DELTA®-MS, DELTA®-DRAIN, and all DELTA® drainage composites.


    DELTA®-MOLDSTRIP is a molding used to finish off the installation of DELTA®-MS and DELTA®-DRAIN at the flat tab, around windows and doors, at grade level, or at grade changes in the foundation.


    DELTA®-SCREW FASTENERS securely fix drain boards to perimeter insulating boards without penetrating the waterproofing membrane. They are ideally suited for mounting DELTA®-DRAIN onto perimeter insulating panels made of XPS with a minimum thickness of 2" (60 mm).


    DELTA®-SEALANT is an elastic sealing compound for installation of DELTA®-MS and DELTA®-DRAIN.