The Wiedemann Group
Pooling expertise.
Preserving value.
The Wiedemann Group brings together several specialized companies in the fields of building restoration and concrete protection. Together, we offer a wide range of services. From drinking water systems and reservoirs to bridges, industrial floors, and building retrofits, as well as composite thermal insulation systems and CFRP reinforcements.
With locations in Germany and Switzerland, we operate throughout the DACH region. Our strengths lie in our technical expertise, coordinated processes, and reliable execution.
Fritz Wiedemann & Sohn GmbH
Building restoration with experience.
Fritz Wiedemann & Sohn GmbH is the parent company of the group. Since 1947, the company has specialized in the maintenance and protection of concrete structures.
The company is headquartered in Wiesbaden and has an additional branch in Dresden. Its core areas of expertise include drinking water systems, structural repair, waterproofing, corrosion protection, and external thermal insulation composite systems (ETICS).
Certified processes and continuous quality improvement are central to the company’s operations.
Wiedemann Reservoirschutz AG
Ensuring a safe drinking water supply.
Wiedemann Reservoirschutz AG, headquartered in Basel, specializes in the repair and coating of drinking water reservoirs.
The company brings local expertise and experience to the Swiss market and operates in accordance with the technical and hygiene requirements in effect there.
The focus is on durable, purely mineral-based coating systems for drinking water facilities.
Bau Zier GmbH
Renovation of existing buildings.
Bau Zier GmbH, based in Dresden, complements the Wiedemann Group in the area of building repair and renovation of existing structures.
The company has strong regional roots and brings practical experience in implementing complex renovation projects.
Close collaboration within the group enables coordinated workflows and efficient project management.
Wannenwetsch GmbH
Precise preparation for sustainable renovation.
Wannenwetsch GmbH, based in Meiningen, specializes in surface preparation and high-pressure water jetting.
Its services often serve as the foundation for subsequent repair and coating work.
Using state-of-the-art technology and experienced teams, Wannenwetsch supports projects across the entire group.