The city of Göttingen is currently renovating its town hall and after a five year break, the hall is scheduled to reopen in February 2024. A fischer BWM system solution for the rear-ventilated façade made it possible to fasten the building shell in an easy-to-install and permanently secure manner.
fischer BWM supported the planners and executors with the right system solution for the façade renovation. Existing, mortared and mechanically fastened ceramic tiles on the building shell were initially carefully dismantled, refurbished and reused in the current rear-ventilated façade. Damaged or missing tiles were replaced with newly designed ones.
When attaching the façade, fischer BWM provided comprehensive technical support throughout the process. The base of the building shell consists of reinforced concrete and undefined masonry, the existing tiles were attached to this with strips of mortar and brass bands. For the façade renovation, the elements were completely dismantled and cleaned manually. Also, the concrete of the exposed subsoil was renovated. The VHF was built on the base, including new thermal insulation, in accordance with the energy requirements.
The ceramic plates have two different geometric reliefs with a circle and triangle, as well as five colour glazes in dark blue, blue, red, violet and white. New tiles in old pink and pigeon blue remain in the colour style of the existing tiles, so the square relief of the new tiles complements the basic geometric shapes of the existing one. “The new façade connects the past and future of the building in a sustainable way,” emphasises Heiko Sasse, partner in the architectural firm of sasse architekten BDA. “The façade, which appears flat in colour from a distance, also shows a differentiated and heterogeneous play of colours as you approach it.”
Both the old and the new tiles are made of a building material that is not regulated for the ventilated façade. The application therefore required a ZiE from the Lower Saxony Ministry for the environment, energy, building and climate protection. The attachment was carried out using Zykon plate anchors FZP II – while the tiles have small dimensions, four fasteners were still installed per panel to prevent the façade from ‘rattling’ under the influence of wind. Once the ZiE was successfully obtained, the façade elements were attached using the fischer BWM aluminium substructure.
“We would like to thank the expert and reviewer Prof. Dr. Alfred Stein, whose assessment of the façade construction made an important contribution to the most suitable façade fastening,” says Jochen Burbach, head of fischer BWM façade systems Germany. “The system thus ensures that the tiled façade is secured securely and at the same time in a concealed manner in order to preserve the original face of the Göttingen town hall for generations to come.”
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