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Cosella Dorken (2)
Tunnel Drainage Systems:

Proper drainage is critical to the integrity and longevity of tunnels. A high-performance dimpled membrane will avert moisture infiltration issues and keep the tunnel's structure sound. DELTA® drainage products have been used in some of the world’s most challenging tunnel projects for many years.

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DELTA®-MS 20 is especially reliable for high performance seepage and drainage layers in tunnelling and other double shell horizontal or vertical constructions. DELTA®-MS-20: 6’ 7” x 65’ 7 (430 sqft)


  • Vertical Underground
  • Horizontal Underg
  • Tunnel Ceiling & Wall Application

Delivered Price $664.00
DELTA®-MS 20 is especially reliable for high performance seepage and drainage layers in tunnelling and other double shell horizontal or vertical constructions. DELTA®-MS-20: 6’ 7” x 65’ 7 (6 Rolls -2580sqft)


  • Vertical Underground
  • Horizontal Underg
  • Tunnel Ceiling & Wall Application

Delivered Price $3,655.00