CarGarantie G10 - New office and administration building

Short description

Implenia built the shell of an office and administration building.

The project

Car-Garantie Versicherungs-AG is a pan-European specialist for used car, new car and motorbike warranties with an annual turnover of EUR 235 million. A new office building with two basement levels of underground parking was to be built in Freiburg (headquarters) at a cost of around EUR 9 million. Implenia constructed the shell with a total of around 8,300 m² of ceiling space divided into a 7-storey building. The concrete walls in the upper floors remain untreated (exposed concrete) and were constructed with wall formwork with a stainless steel formwork skin. The basement was constructed as a white tank, partly with hollow walls, and was additionally sealed with a SikaProof fresh concrete composite foil in the technical rooms.

Services in detail

Total quantity 4,600 m³ concrete, 600 t structural steel, 800 m2 cavity walls


  • Small construction site installation area
  • Tight construction time and exposed concrete requirements, therefore application of steel formwork
  • White tank with fresh concrete composite waterproofing SikaProof
  • Concrete core activation

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