Düsseldorf Kö-Bogen

Curved facade glass units for the Düsseldorf Kö-Bogen

Curved insulating glass elements represent the highest art form in architectural facade elements. The sensational concave and convex facades made of natural stone and glass of the Düsseldorf Kö-Bogen constituted a black box project for the glass processors and facade designers - in this case Döring Glas from Berlin and the Lindner Group from Arnstorf. Following a complex development process with numerous test runs, a technical solution was created that satisfied all parties, both in architectural terms and also in terms of the building's structural physics. The technology specialist of the Heinsberg based company, Christoph Rubel, explains what importance the spacers have in a project of this magnitude – a facade surface of nearly 15,000 m², of which approximately 2,200 m² alone are curved and kinked glass elements that are custom-made and envelop the building: “the glass elements were bonded both internally and externally, whereby the outer bonding acts as a mechanical safeguard. Glued glass connections require a UV-stable, gas-tight silicone sealing. Using our Super Spacer® T-Spacer™Premium Plus we have repeatedly passed the compliance tests according to EN 1279 with standard insulating glass silicones. Therefore, we also meet the most stringent criteria for the processing in structural insulating glass elements. 2,200 m² of insulated glass units in different radii and panel widths of 2.70 metres and heights of up to 5.60 metres were manufactured for Düsseldorf. This can only be achieved by a glass processor with a flexible spacer that adjusts to any conceivable glass form and can be precisely positioned down to the last millimetre on an automatic line to ensure the parallelism of the glass panes.