
Planning, execution and maintenance of plumbing, heating, ventilation and piping systems in Herisau

alder haustechnik GmbH
Herisau, SwitzerlandNew on Amplifa
About us
alder haustechnik GmbH is a family-owned company based in Herisau in the Appenzellerland region (Switzerland), specialising in the planning, execution and maintenance of plumbing and heating systems as well as piping construction. The range of services also includes ventilation; customers receive an all-round service from a single source, from project planning through installation to ongoing maintenance. The company originated from a tinsmithy founded in 1898 in Schwellbrunn, which moved to Herisau in 1943 and was later expanded to include plumbing installations. As of 1 January 2017, Judith and Matthias Widmer took over the long-established business and continue to run it as alder haustechnik GmbH, with the heating sector as a new service focus. Customers are private individuals and commercial clients in the region, particularly for bathrooms, renovations and building services systems.
- Site
- Herisau
- Processes
- Plumbing installations, Heating systems (planning, execution, maintenance), Ventilation, Piping construction, Planning of plumbing and heating systems, Maintenance of plumbing and heating systems, Plumbing, Heating
- Materials
- Plumbing installations, Heating systems, Ventilation systems, Piping construction
- Founded
- 1898
- Industries
- Building services / private and commercial customers (plumbing, heating)
- 01
Planning
- 02
Execution
- 03
Maintenance
Services and processes
Plumbing installations
Planning and execution of plumbing systems, e.g. bathrooms and renovations.
Heating systems
Planning, execution and maintenance of heating systems, offered since 2017.
Ventilation systems
Installation of ventilation systems as part of the building services offering.
Piping construction
Piping construction for plumbing and heating installations.
Location

Herisau
CHHeadquarters / Mühlehof operating building
Services



Inside the production

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Plumbing installationsAssembly | – | – | – | – | – |
| Heating systems (planning, execution, maintenance)Assembly | – | – | – | – | – |
| VentilationAssembly | – | – | – | – | – |
| Piping constructionAssembly | – | – | – | – | – |
| Planning of plumbing and heating systemsEngineering | – | – | – | – | – |
| Maintenance of plumbing and heating systemsAssembly | – | – | – | – | – |
Additional services
History
- 1898
Johannes Alder founds a tinsmithy in Schwellbrunn.
- 1932
Hans Alder takes over the company and expands it to include plumbing installations.
- 1943
Relocation to Herisau, Schwellbrunnerstrasse 38.
- 1973
Rolf Alder takes over the business.
- 1988
Occupancy of the newly converted operating building in the Mühlehof, Schwellbrunnerstrasse 1.
- 1999
Rolf Alder sells the tinsmithy division to Fio Jud (Alder Spenglerei, owner Fio Jud).
- 2009
Fio Jud acquires the Mühlehof commercial property and the plumbing division of Sanitär Alder AG.
- 2017
Judith and Matthias Widmer take over the business as of 1 January as Alder Haustechnik GmbH; new in the offering: heating.