Colourful activity on the facade

60s building envelope of Göttingen City Hall successfully repaired – with fisher system solution

Colourful activity on the facade

The city of Göttingen is currently renovating its town hall. The most striking and characteristic feature of the building has already been successfully restored: The colourful tiled facade from the 60s. A Fischer BWM system solution for the curtain-mounted back-ventilated facade (VHF) made it possible to fasten the building envelope in an easy-to-install and permanently secure manner.

After a five-year renovation break, the monumental Göttingen City Hall is scheduled to reopen in 2024 February. For almost 60 years, the institution has been providing the ideal stage for a wide range of events. 2,600 m2 of event space on three levels as well as a total area of almost 5,400 m2, plus 900 m2 of roof terrace area, open up plenty of space for culture and exchange. Among other things, it is the venue of the Göttinger Symphonieorchester and the International Handling Festival. One controversial topic in the 60s was the unusually designed facade, which gave the town hall the loving nickname “tiled furnace” and established itself as a unique landmark of the city over the years. 

The renovation of the building envelope began in 2019 December and was successfully completed at the beginning of 2023. In doing so, fischer BWM supported the planners and implementers with the right system solution for the facade renovation. Existing, mortared and mechanically fastened ceramic tiles on the building envelope were first carefully dismantled, reconditioned and reused in the current curtained back-ventilated facade (VHF). Damaged or missing tiles were replaced by newly designed tiles produced by m&r manufaktur (Saarbrücken). The approach is based on the award-winning, sustainable facade concept of the office designed by sasse architekten BDA from Dortmund. Dach Schneider Weimar GmbH (Umpferstedt) was the commissioned facade construction company. 
The new facade connects the building’s past and future in a sustainable way.
Heiko Sasse, shareholder in the architectural office, is to be assigned to sasse architekten BDA
The 50 x 50 x 3 cm ceramic tiles feature two different geometric reliefs with circles and triangles as well as five coloured glazes in dark blue, blue, red, purple and white. New tiles in dusty pink and pigeon blue remain in the colour duct of the existing tiles. The square relief of the new tiles complements the basic geometric shapes of the stock. The extensions (logistics and canopies) have been clad with the white tiles, the hall body is exclusively colourful. “The new facade connects the past and future of the building in a sustainable way,” emphasises Heiko Sasse, shareholder of the architectural office for sasse architekten BDA. “The facade, which appears to have a wide-ranging colour surface, also shows a differentiated and heterogeneous play of colours during the approach, which is further reinforced and expanded by the geometric reliefs – similar to the city as a uniform structure, but consisting of different individuals.” 

Property description

Commissioned facade construction company:
Dach Schneider Weimar GmbH (Umpferstedt)
Construction time:
2019 - 2023
Total surface area
5,400 m²
Facade concept
should sasse architekten BDA (Dortmund)
Event space
2,600 m2 on three levels
The supporting base of the building envelope consists of reinforced concrete and undefined masonry. The existing tiles were attached to this with mortar strips and brass strips. For the facade renovation, the elements were completely dismantled and cleaned manually. The concrete of the exposed subsoil was renovated. In some cases, the insufficient concrete cover of the reinforcement could be restored. The VHF was erected on the base with new thermal insulation in accordance with the energy requirements. “We provided comprehensive technical support for facade fastening,” reports Jochen Burbach, Head of fischer BWM Fassadensysteme Deutschland. “Our services ranged from consulting and calculation in the planning phase to our support in obtaining approval in individual cases (ZiE) and the delivery of the suitable complete system consisting of substructure, frame anchors, injection anchors and undercut anchors from a single source.” 
Jochen Burbach explains about on-site support: “We supported the facade builders in the facade installation with a number of construction site tests with our fish long-shank anchors and chemical fastening systems and offered assistance with the construction.”
Both the old and the new tiles are made of a building material that is not regulated for the back-ventilated facade. The application therefore required a ZiE from the Lower Saxony Ministry for the Environment, Energy, Construction and Climate Protection, which was issued by the expert and appraiser Prof. Dr. Alfred Stein was supervised. It was fastened with cyclone plate anchors FZP II in the 11x21 M6/SO/9 carbon version. Even though the tiles are small in size, four fixings per tile were nevertheless made to prevent the facade from “rattling” when exposed to wind.
After the ZiE was successfully achieved, the facade elements were installed with the fischer BWM aluminium substructure. The facade builders implemented the spacer substructure vertically with the ATK 100 ZeLa. “The thermally optimised ZeLa holder with stainless steel blade shows its advantages here,” emphasises Steffen Bendix, who was involved in the project as a sales engineer at fischer BWM. “The ZeLa bracket thus guarantees compliance with the required heat protection requirements (U-value) with a low build-up.” The horizontal systems consisting of the ATK 103 P20 for concealed clip fastening together with P20 horizontal profiles were attached to this basic structure. fischer long shank anchors and injection anchors anchor the wall brackets of the substructure in the supporting structure. The visible elements with the retained and new tiles were securely and concealed attached to the substructure with the fish undercut anchors.

"We would like to thank the expert and appraiser Prof. Dr. Alfred Stein, whose assessment of the facade construction made an important contribution to the most suitable facade fastening," says Jochen Burbach. “This is how the system ensures that the tile facade is securely and concealed at the same time, in order to preserve the original face of the Göttingen City Hall for generations to come.”
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