About us

About Kalzip

Kalzip is one of the leading suppliers of aluminium building envelopes. We have been producing roof and facade systems on state-of-the-art roll forming machines since 1968. To date, more than 100 million square metres of Kalzip profiled sheets have been installed worldwide. With international sales offices and a global fleet of mobile production units, Kalzip is represented in almost all parts of the world.

Kalzip building systems meet the highest standards in terms of building physics and design for the realisation of roofs and facades which are both functional and visually fascinating.

Collaborating with Kalzip also means being able to draw on many years of experience and resource to ensure your ideas are turned into reality

For more than 50 years Kalzip has remained at the very forefront of architectural design, constantly pushing the boundaries of creative potential. The experience gained over many years, together with our highly-specialised technical expertise, guarantees the ultimate in quality and reliability – right down to the very last detail.

Discover the innovative and creative possibilities of Kalzip building envelopes and be inspired by the durable and versatile system solutions that Kalzip offers.

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established in Koblenz


Kalzip® profiled sheets installed worldwide


Successful projects annually

Kalzip from yesterday to today.

Kalzip, initially a product of the American company Kaiser Aluminium, was established in Germany in 1967. At the same time the production and marketing of Kalzip began in Koblenz.

In 1968, the first Kalzip roof was installed at the Nuremberg Congress Hall. Due to the popularity of the product, Kalzip quickly developed into a major player as a manufacturer of metal roof coverings.

This was followed in 1972 by a move within Koblenz to a new, larger location, where the headquarters are still located today. By 1974, over one million square metres of Kalzip profiled sheets had already been installed.

Today, after 50 years, Kalzip is proud of its long history and its involvement in numerous impressive buildings, such as the “Stadio delle Alpi”, in Turin that was opened in 1990 for the Football World Cup, the “Barajas Airport” in Madrid with 232,000 square metres of Kalzip profiled sheets and the “King Abdullah Airport” with a roof area of 350,000 square metres.

Kalzip gained worldwide attention in 2016 when the sarcophagus for the damaged Chernobyl nuclear power station, was clad with 168,000 square metres of Kalzip sheets produced in stainless steel.

Today Kalzip is a member of the Donges Group. The Donges Group is the leading supplier of bridge and steel constructions as well as roof and facade systems in Europe.


Kalzip factory area


Kalzip production area


Kalzip storage area


Kalzip sustainability focuses on aluminium itself – a material that can be recycled as often as required and has sufficient reserves. It makes a significant contribution to protecting buildings effectively and over decades against external influences and to maintaining their value in the long term.

Thanks to its durability and excellent recycling properties, three-quarters of the aluminium produced worldwide to date is still in use.

One of the outstanding properties of the material is its resistance to weathering and the inherent durability. This creates reassurance, especially when there are high demands on the use of buildings, e.g. at airports, or in aggressive environments, such as near the coast.

  • Third most common element of the earth’s crust
  • Aluminium, once produced, delivers products for generations through recycling
  • It can be recycled without restriction
  • Up to 95% of the energy required for production is saved through recycling
  • Roof and facade products are durable, maintenance-free, deconstructable and therefore recyclable
  • Highly corrosion resistant

recycled aluminium is used in production


of the aluminium produced
are still in use

3. most frequent

Earth crust element

Donges Group

The Donges Group is the leading supplier of steel bridges and steel constructions as well as roof and façade systems in Europe. The company combines the strong brands Donges SteelTec GmbH, Kalzip GmbH and SCW – Smart Curtain Wall S.A. The Donges Group has approximately 1,300 employees and a turnover of around € 500 million.

The product portfolio of the Donges Group includes steel bridges for road, rail and pavement construction, steel building construction, industrial steel construction, and steel frame structures as well as roof and façade solutions made of aluminium, also innovative glass façades for unusual building shapes and an extensive range for flat roof design. The group is internationally positioned and has numerous manufacturing facilities and sales offices in over 30 countries. The Donges Group offers a comprehensive range of products in the field of steel construction and building envelopes for planners and architects, fabricators, property developers, and the public sector.

If you would like to know more about the Donges Group or its brands, please visit our website donges-group.com.

Kalzip is a company of the Donges Group

1300 Employees

in the Donges Group

in 14 Countries

Branch offices or production plants

ca. 360 M €

Annual turnover of the Donges Group


The management of the Donges Group and Kalzip GmbH have many years of expertise and practical experience, actively promoting the development of the company.

Andrew Leach

CEO Kalzip GmbH

Kalzip GmbH, Koblenz (Donges Group)
2021 Chief Executive Officer (CEO)
2019 Head of International Sales

Kalzip, Haydock (Donges Group, Tata Steel Europe)
2019 Head of International Sales
2018 General Manager UK & Ireland

Tata Steel Distribution UK & Ireland (Tata Steel Europe)
2017 Marketing Manager

Construction Structures, Dubai (Tata Steel FZE)
2011 Sales Manager GCC Construction

Corus International Projects (Corus Group)
2009 Commercial Manager, Global Construction Projects
2005 Sales Manager, International Projects
2001 Account Manager, International Projects

British Steel
1997 Business Account Manager (International Distribution)
1996 Inside Sales (Automotive Service Centre)

Masters in Industrial Sales and Marketing: Loughbrough University
BSc (Hons) in Economics and Environmetal Science: Stirling University

Andrew Leach

CEO Kalzip GmbH

Mario Hecker

CFO Kalzip GmbH

Kalzip GmbH, Koblenz
2019 CFO Kalzip Group

Kalzip GmbH, Koblenz (Tata Steel Europe)
2012 Group Controller Kalzip EU/UK/US/ME
2008 Group Controller Kalzip EU

Stabilus GmbH, Koblenz
2003 Head of Controlling
1999 Controller
1998 Trainee Programm

Study Dipl.- Kaufmann (FH)
Harz University of Applied Sciences, Wernigerode

Mario Hecker

CFO Kalzip GmbH

Thorsten Klein

COO Kalzip GmbH

Thorsten Klein

COO Kalzip GmbH

Kalzip GmbH, Koblenz
2019 COO Kalzip Group

Kalzip GmbH, Koblenz (Tata Steel Europe, Corus)
2012 Head of purchasing and production planning
2007 Purchasing Manager
2002 Purchasing

Vedag GmbH, Frankfurt
2000 Deputy Head of Central Purchasing

Veitsch-Radex-Urmitz GmbH
1998 Purchasing spare parts, auxiliary materials and supplies

Further training as a specialist in purchasing and materials management, IHK Cologne
Training as industrial clerk, Veitsch-Radex-Urmitz GmbH

Volker Sauerbrei

Leiter Personal/QS/Technik Kalzip GmbH

Volker Sauerbrei

Head of Personnel/QS/Engineering Kalzip GmbH

Kalzip GmbH, Koblenz (Donges Group)
2019 Head of Human Recourses, QSGU Management Systems and Technology

Kalzip GmbH, Koblenz (Tata Steel Europe, Corus)
2008 Head of Human Recourses and QSGU Management Systems
2002 QSGU management representative (9001; 14001; 18001)
2001 Environmental and safety management officer EN 9001 and 14001
2000 Environmental management officer EN 14001

CSS Draht Schmidt GmbH, Lahnstein
1993 Technical manager “conveyor belt department”

Study Dipl.- Ing. (FH) mechanical engineering
University of Applied Sciences Koblenz

Christoph Schmidt

CSO Kalzip GmbH

Kalzip GmbH, Koblenz (Donges Group)
2019 CSO and Head of Sales Support

Kalzip GmbH, Koblenz (Tata Steel Europe, Corus)
2008 Regional Sales Director Export
1999 Planning manager and material purchasing

Hoogovens Aluminium Profiltechnik, Vogt
1996 Planning Manager Extrusion and Further Processing

Hoogovens Aluminium Profiltechnik, Koblenz
1992 Production planning and dispatch handling

Study Dipl.- Ing. (FH) mechanical engineering
University of Applied Sciences Koblenz

Christoph Schmidt

CSO Kalzip GmbH


Employees at Kalzip


Days accident free


Successful projects