• DELTA® in the Gotthard Tunnel!
    Roland Scheffler
    Roland Scheffler07.06.2016

    DELTA® in the Gotthard Tunnel!

    On June 1, 2016, the 57-km Gotthard Tunnel was officially opened in Switzerland. The materials used in building the world's longest railway tunnel include our high-performance drainage sheets DELTA®-AT 800/1200. Compared to the old Gotthard tunnel, the new link features two tubes, so that more trains can run through it at greater speed. Carrying a price tag of around 11 billion euros, the building of the tunnel took 17 years.

  • A perfect fit
    Dagmar Riefer02.02.2016

    A perfect fit

    Developed especially for hip roofs, the new DELTA®-MAXX WD high-performance sheet ensures an exact fit, greater safety, and optimum installation efficiency. The two adhesive strips integrated in the underside make the installation of the sheet noticeably easier and significantly faster than that of conventional sarking sheets. Thus, roofs will be safely covered and also optimally protected from weather influences.

  • DELTA® goes mobile
    Lars Piechel21.11.2014

    DELTA® goes mobile

    The newly-created mobile version of our internet presence will be displayed automatically whenever a customer uses a smartphone or a tablet for access. Adapted to a smaller display, the mobile page is quite easy to operate.

  • Strongman-tested
    Roland Scheffler
    Norbert Klingelhage01.09.2014


    30 years' experience, elaborate development activities, and the results of extensive laboratory tests enabled Delta-Maxx X to reach its high standard of quality. To prove the outstanding performance characteristics of the new sarking membrane, Dörken GmbH & Co. KG hit on a genuine endurance test: Daniel Wildt, Germany's Strongest Man 2013, tested the material in his own special way – in various disciplines that can also be seen in international strongman contests.

  • Ewald Dörken AG distinguished as top innovator
    Roland Scheffler
    Roland Scheffler27.06.2014

    Ewald Dörken AG distinguished as top innovator

    Herdecke company among the winners of 'Top 100' / Honoured by Ranga Yogeshwar at the German SME Summit / Dörken GmbH & Co. KG, a Dörken Group company, received the coveted seal of quality for the fourth time.

Dörken GmbH & Co. KG

Dörken GmbH & Co. KG
Wetterstraße 58
D-58313 Herdecke

Phone     0 23 30/63-0
Fax         0 23 30/63-355
E-Mail   bvf@doerken.de

Dörken Worldwide

Dörken Worldwide

© Dörken GmbH & Co. KG. · A Dörken Group Company · DELTA® is a registered trademark of Ewald Dörken AG, Herdecke, Germany.