The Problems

Waterproofing a tunnel can be one of the most demanding tasks in the construction industry. To protect the structure and provide longevity, proper moisture control is necessary.  

The Solution

Using a dimpled membrane will allow a drainage course and will also prevent capillary movement. DELTA®-MS 20 is a compression-resistant, durable, dimpled sheet made from special HDPE. Its high drainage capacity enables the product to meet all requirements for occurring water problems on tunnel construction projects.

This product is a heavy gauge version of DELTA®-MS with deep 20 mm studs. It is used where extra drainage capacity is required, such as deeper structures within tunneling and other double-shell horizontal or vertical constructions, or where a larger flow rate is required. 

Product Details
Product Benefits
  • Studded membrane composed of HDPE 
  • Available by special order
  • 20 mm studs create an air gap at the foundation base, creating a free drainage path, allowing any water that gets past the dimpled plastic sheet to fall freely to the footer drain
  • High drainage capacity
  • Impermeable to water and water vapors
  • Impervious to acids and other agents
  • Tough, resilient and durable – has an expected service life of more than 50 years
  • Unlike a coating, product bridges all size cracks, ignores damage points and deflects water 

Product Details

Safety Data Sheets

Technical Data