DELTA®-MAXX PLUS Energy-saving membrane
Vapour permeable windproof underlay with integrated self-adhesive edge. For use on fully insulated pitched roofs. Also suitable for use as a sheathing membrane.

• Proven longevity
  DELTA^®-MAXX PLUS offers proven longevity. A characteristic that our membrane has illustrated under the toughest conditions and in a range of test procedures. The corresponding ETA also testifies to the high performance and resistance.
• With 30-year warranty
  We guarantee that DELTA^®-MAXX PLUS, expertly installed, will retain its function (resistance against water penetration: Class W1) for 30 years. If a problem arises regarding this during this time, we will not only replace the material, but also bear the cost of removal and installation. The procedure is simple: One call and we take care of it.
  Click here for the statement of warranty.
• Up to 30% material savings
  Thanks to the double adhesive strips, during the laying work much less material is consumed because the roofing membrane can simply be rotated. For you this means: minimal waste and, as a consequence, lower costs. Depending on the size of the roof, the roof pitch and the roof shape, material savings can be up to 30 percent compared to the roofing membranes with standard gluing.
• High fire resistance
  Euro fire class B makes it much harder for flames to spread with DELTA^®-MAXX PLUS. This means reliable protection for both house and inhabitants.
• Enduring energy savings
  The self-adhesive edging prevents cold exterior air and moisture from penetrating. This protects the roof and saves precious energy and heating costs – for an enduringly energy efficient roof structure.
• Tested fall-through protection
  The special combination of high tear resistance and strong elasticity means that DELTA^®-MAXX PLUS has convincingly passed the increased testing for fall-through protection and offers you and your colleagues significantly greater safety on the roof.
• Proven nail tightness
  Sufficient watertightness of the perforation points of screws and nails in Class 3 roofs has been reliably achieved - even without the use of nail sealing material (see also ETA-20/0405 and corresponding notes in the installation instructions for sarking, underlay and formwork membranes).
• High flexibility
  The elastic, flexible material of DELTA^®-MAXX PLUS also compensates minor missteps when accessing the main battens. This also contributes to the long-lasting protection of the roof!
• Equipped with DELTA^®-AMS, DELTA^®-AdTec and DELTA^®-BiCo technologies.
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Technical data 

Quality - made in Germany

"Our products are up to any test."
Dörken keep setting new standards of quality, offering all-round solutions for roofs and cellars. The outstanding track record of its products, its comprehensive technical knowhow, and its excellent service have made Dörken GmbH & Co. KG one of the leaders in the European market for building materials. For more than 50 years, high-quality laminated sheets for roofs, façades, and cellars have been made in Herdecke under the brand name DELTA®. 

Rigid quality controls – for sophisticated demands.
First-class materials, continuously and strictly monitored at every stage of the manufacturing process, guarantee enduring functionality and a long life. For us, quality means that our customers are satisfied and their expectations have been more than fulfilled. This implies constantly checking, reviewing, and improving products and processes. To think everything through down to the smallest detail: having fulfilled this ambition for more than 120 years, Dörken remains a powerful partner of dealers, planners, and craftsmen.

Those who rely on our products will reap long-term benefits.
Our promise 'DELTA® protects property. Saves energy. Creates comfort.' may be taken literally. For our system solutions from roof to cellar produce convincing
results – worldwide. This is because the quality of our products 'made in Germany' is high, our solutions are adapted to practical conditions, products and accessories can be combined to fit exactly, and the service we offer you is excellent right from the start. 

Made in Germany – to us, more than a mere seal of quality.
Join all those who benefit from the extreme dependability and lasting functional reliability of our innovative and efficient products of proven Dörken quality which we continuously check and improve in our own test laboratories. And you may not only rely on top-quality materials. For more than 50 years, composite sheets of sustainably good quality for cellars, façades, and roofs have been made in Germany . At our group headquarters in Herdecke as well as in Hagen-Vorhalle, in one of Europe 's leading-edge production facilities for spunbonded cloth. Not for nothing are we market and technology leaders in this field across Europe