Wiedemann

What Wiedemann does

Fritz Wiedemann & Sohn GmbH, operating as Wiedemann, is a Wiesbaden-headquartered, family-owned specialist construction company founded in 1947 that delivers concrete structure restoration, protection, and reinforcement services across the DACH region (Germany, Austria, Switzerland, Luxembourg). Its core offerings span Building Restoration (BWI) and Concrete Repair, Drinking Water System Renovation (DVGW W 316-compliant mineral coatings and CFRP reinforcement), ETICS/WDVS thermal insulation, sprayed mortar application (Kerasal/DIN 18551), cathodic corrosion protection, building waterproofing, and condition analysis. The company employs 51–100 people and operates through a group structure: the parent Fritz Wiedemann & Sohn GmbH (Wiesbaden HQ, Dresden branch), Wiedemann Reservoirschutz AG (Basel, Switzerland), Bau Zier GmbH (Dresden), Wannenwetsch HDW GmbH (Meiningen, surface preparation and high-pressure water jetting, acquired 2024), and ETAWA Edelstahltechnik für die Wasserwirtschaft GmbH (Zwickau, stainless steel fabrication for water infrastructure).

Wiedemann generates revenue through project-based B2B contracts awarded via direct field engagement, competitive public tender, and subcontracting to general contractors. Customers include municipal water utilities, public infrastructure owners (bridges, highways, civil structures), universities, residential developers, and large general contractors; named projects include Premier Inn Wiesbaden (Wolff Hoch- und Ingenieurbau), Wohnbau Wörth am Rhein, Philipps-Universität Marburg, NATO air base Büchel, and Trinkwasserbehälter Horeb Pirmasens. Pricing is project-quoted, not publicly disclosed. Sales channels include the website, LinkedIn/Facebook/Instagram/Xing, earned media (Economic Forum interview with Managing Director Dipl.-Ing. Frank Ackermann), and direct enquiry forms. The company's leadership comprises Managing Director Dipl.-Ing. Frank Ackermann and Dipl. Betriebswirt (FH) Meik Hering.

Wiedemann's competitive position rests on a portfolio of certifications that create regulatory barriers: ISO 9001:2015 (valid through April 2027), DVGW W 316 specialist certification at two locations, GÜB quality mark, WHG, MHAVO, DAfStb CFRP reinforcement suitability, and Kerasal sprayed mortar certification. These credentials, combined with 75+ years of accumulated specialist know-how, qualify the firm for regulated tenders in drinking water infrastructure and public concrete restoration across the DACH region.

Name

Wiedemann

Legal name

Fritz Wiedemann & Sohn GmbH

Website

https://wiedemann-gmbh.com

Company type

Private

Founded year

1947

Operating status

Operating

Headcount range

51–100 employees

Short description

Wiedemann is a family-owned specialist construction firm (founded 1947, Wiesbaden) delivering concrete restoration, drinking water tank renovation, and ETICS façade insulation to municipalities, public infrastructure owners, and general contractors across the DACH region.

Ownership category

akta.pro rank

Product category

Concrete Restoration & Building Preservation Services

NAICS

Water and Sewer Line and Related Structures Construction (237110), Utility System Construction (2371)

SIC

Construction - Special Trade Contractors (1700)

akta.pro primary industry

Water Treatment Plant Construction (Drinking Water) (IMAFAGAA)

Keywords

• Concrete restoration services
• Drinking water tank repair
• Cathodic corrosion protection
• CFRP structural reinforcement
• External thermal insulation systems

Headquarters

HQ city

Wiesbaden

HQ country

Germany

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Supply Chain, Infrastructure, Marketing or Sales

Revenue model

1. Construction Services & Project Contracts: Revenue is generated through project-based contracts for building restoration, concrete repair, drinking water system renovation, and thermal insulation. Projects are delivered to infrastructure owners, municipalities, general contractors, and property developers on a per-project basis, with scope ranging from small repairs to large-scale infrastructure projects.
2. General Contractor Services: Wiedemann also acts as a general contractor coordinating multiple trades on restoration projects, broadening revenue scope.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels7 records

Core offering

Wiedemann is a construction services company that specializes in the repair, protection, and reinforcement of concrete structures, with particular focus on DVGW W 316-certified drinking water tank renovation, building restoration (Bauwerksinstandsetzung), concrete repair (Betoninstandsetzung), sprayed mortar application, cathodic corrosion protection, CFRP structural reinforcement, and external thermal insulation composite systems (ETICS/WDVS). The company delivers projects on a contract basis to municipal water utilities, public infrastructure owners, property developers, and general contractors across the DACH region.

Product overview

Wiedemann is a family-owned construction and building restoration company founded in 1947, providing specialized services for the repair, protection, and restoration of concrete structures. The company operates as a unified group of specialized subsidiaries rather than a single unified software platform. The core offerings include Building Restoration (BWI), Concrete Repair, and Drinking Water System Repair as the primary service categories, supplemented by specialized services such as Sprayed Mortar Application, Floor Coating, Building Waterproofing, Cathodic and General Corrosion Protection, and External Thermal Insulation Composite Systems (ETICS/WDVS). The Wiedemann Group comprises Fritz Wiedemann & Sohn GmbH (parent company in Wiesbaden/Dresden), Wiedemann Reservoirschutz AG (Switzerland), Bau Zier GmbH (Dresden), Wannenwetsch HDW GmbH (Meiningen), and ETAWA GmbH (Zwickau). Services span the DACH region including Germany, Austria, Switzerland, and Luxembourg.

Differentiator

Problem solved

Functional benefit

Products and services

• Bauwerksinstandsetzung (BWI) - Building Restoration Core building restoration services for concrete structures, including investigation, repair, and surface protection, providing economical and durable preservation of buildings. Offered to municipal water utilities, infrastructure owners, property developers, and general contractors across the DACH region.
• Betoninstandsetzung - Concrete Repair Specialized concrete repair services for restoring damaged or deteriorated concrete structures to their original condition. Targeted at infrastructure owners, municipalities, and general contractors needing repair of bridges, parking decks, and civil engineering assets.
• Instandsetzung von Trinkwasseranlagen - Drinking Water System Repair Specialized repair and coating services for drinking water tanks and systems, performed hygienically safely with low porosity and compliant with DVGW W 316 standards. Includes mineral coating, structural reinforcement, insulation, waterproofing, and condition analysis. Targeted at municipal water utilities and operators of drinking water reservoirs and elevated tanks.
• Wärmedämmverbundsysteme (WDVS) - External Thermal Insulation Composite Systems (ETICS) External thermal insulation composite systems (ETICS/WDVS) for improving building envelopes, reducing energy consumption, and increasing property value, including façade insulation, interior insulation, ceiling insulation, and green façades. Offered to property developers, housing associations, building owners, and universities.
• Spritzmörtelapplikation - Sprayed Mortar Application Application of high-pressure sprayed mortar for concrete repair and surface restoration on large-scale building and infrastructure projects. Uses Kerasal-certified products and is targeted at infrastructure owners and construction firms needing large-area concrete restoration.
• Kathodischer Korrosionsschutz - Cathodic Corrosion Protection Electrochemical corrosion protection systems for reinforced concrete structures to prevent and arrest steel reinforcement corrosion. Targeted at infrastructure owners and municipalities seeking long-term durability for bridges, parking decks, and civil engineering structures.
• Statische Verstärkung & Ertüchtigung - Structural Reinforcement (CFRP) Structural strengthening and upgrading of concrete components using carbon fiber reinforced polymer (CFRP) lamellas bonded into slots or surface-bonded. Certified in accordance with DAfStb guidelines. Targeted at civil engineering and infrastructure projects requiring reinforcement without major demolition.
• Bauwerksabdichtung - Building Waterproofing Waterproofing services for buildings to prevent water ingress and protect structural integrity. Offered to property developers, building owners, and infrastructure operators as part of comprehensive restoration projects.
• Bodenbeschichtung - Floor Coating Industrial floor coating services for protective and decorative floor finishes in commercial and industrial facilities. Targeted at property developers and industrial facility operators.
• Generalunternehmerleistungen - General Contractor Services Complete general contractor services for building restoration and repair projects, coordinating multiple trades on complex renovation assignments. Broadens Wiedemann's role beyond specialist subcontractor to principal contractor on full restoration scopes.
• Zustandsanalyse - Condition Analysis Professional assessment and analysis services for evaluating the condition of concrete structures and buildings. Typically offered ahead of or alongside renovation projects to inform scope and methods.

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Five partnerships are on record, tiered core.

• Fritz Wiedemann & Sohn GmbH (Parent)coreOthersThe parent company of the Wiedemann Group, headquartered in Wiesbaden with a branch in Dresden. Serves as the central entity for building restoration, concrete repair, drinking water systems, and ETICS operations.
• Wiedemann Reservoirschutz AGcoreOthersSwiss subsidiary headquartered in Basel, specializing in the repair and coating of drinking water reservoirs using purely mineral-based coating systems. Provides local expertise and experience for the Swiss market in compliance with Swiss technical and hygiene requirements.
• Bau Zier GmbHcoreOthersDresden-based subsidiary specializing in building repair and renovation of existing structures. Brings strong regional roots and practical experience in implementing complex renovation projects, enabling coordinated workflows within the group.
• Wannenwetsch HDW GmbHcoreOthersMeiningen-based subsidiary specializing in surface preparation and high-pressure water jetting. Its services serve as the foundation for subsequent repair and coating work, using state-of-the-art technology and experienced teams to support projects across the entire group.
• ETAWA Edelstahltechnik für die Wasserwirtschaft GmbHcoreOthersZwickau-based subsidiary specializing in stainless steel and metal fabrication for water supply, plant and pipeline construction, and wastewater treatment systems. Also manufactures custom components and structures for industry, construction, and infrastructure.

Scale indicators4 records

Recent moves8 records

Expansion highlights5 records

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks4 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/WiedemannGmbH
• LinkedInlinkedin.com/company/wiedemann-gmbh
• Instagraminstagram.com/fritz_wiedemannundsohn

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

Subsidiaries4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Wiedemann