Prefabrication of clinker, concrete and clay brick facade elements as well as room-in-room systems for the construction sector
Keller Unternehmungen (Keller Holding AG)
Pfungen · Frick · Winterthur (Töss Plant)New on Amplifa
Family company since 1857
Keller Unternehmungen is a family-owned construction services company headquartered in Pfungen (Canton of Zurich), founded in 1857 by Johann Jakob Keller as a brickworks. Over five generations, the brick producer has evolved into a system provider in the construction sector with the five business units Fassaden (Facades), Baudienst (Building Services), ImRaum, Immobilien (Real Estate) and MitLehm. In the facades segment, clinker facades made from extruded, water-struck, re-use and acoustic clinkers as well as preton concrete and brick-faced facade elements are offered; the prefabrication of masonry and facade elements is robot-assisted. The offering also includes the refurbishment, cleaning, hydrophobization and graffiti protection of facing brick and clinker facades as well as partition, folding and fire protection walls and room-in-room systems made of aluminium, glass and wood. Through the MitLehm business unit, rammed earth elements (ROBmade) and prefabricated clay brick elements are produced; the company has six of its own Swiss clay pits, including the pit in Frick with a works railway built in 1935. The activities are consolidated in Keller Holding AG with the companies Keller AG Ziegeleien, Keller Systeme AG, Keller Prefadom AG and Tonwerke Keller AG; the production and distribution of backing and facing bricks was transferred to Kubrix AG in 2021.
- Site
- Pfungen
- Processes
- Prefabrication of masonry and facade elements (robot-assisted), Clinker facades, Prefabrication of preton facade elements / brick-faced elements / concrete elements, Planning & execution (facade projects), Facade refurbishment / facade cleaning, Hydrophobization / graffiti protection / maintenance inspection, Partition, folding and fire protection walls / room-in-room systems (ImRaum), Rammed earth elements ROBmade / clay brick elements (prefabrication)
- Materials
- Extruded clinker, Water-struck clinker, Re-Use clinker, Acoustic clinker, kelesto facing brick red and white, Concrete, Clay / rammed earth, Aluminium (aluminium profile)
- Founded
- 1857
- Industries
- Construction sector, Architects, General contractors, Real estate, Office and working environments, Residential and commercial construction
- 01
Clay extraction in own clay pits
- 02
On-site clay analysis (manual test methods and X-ray diffractometry)
- 03
Planning and execution planning of facade projects
- 04
Robot-assisted prefabrication of masonry and facade elements
- 05
Delivery by truck/low-loader
- 06
Assembly on the construction site
Materials & Products
Extruded clinker
For clinker facades and elements, used among other projects on the Letzibach high-rise development in Zurich.
Water-struck clinker
Traditionally produced clinker for facades, for example at Gebr. Hilti in Schaan and Lokstadt Winterthur.
Re-Use clinker
Reused clinker as a sustainable facade solution.
Acoustic clinker
For sound-absorbing facade and element applications such as the noise barrier in Brugg.
preton concrete and brick-faced elements
Concrete facade elements and clinker-faced elements from in-house prefabrication.
Clay / rammed earth (ROBmade)
Sustainable building material from own clay pits for rammed earth and clay brick elements.
Facing brick (kelesto)
Facing brick in red and white, among others for the Weinfelden brewery.
Aluminium, glass, wood
Materials for partition walls, folding walls, fire protection walls and room-in-room systems (ImRaum).
Locations
Pfungen
CHHeadquarters of Keller Holding AG; Keller Systeme AG (Facades, Building Services, ImRaum, MitLehm), Keller AG
- Lot size
- Project-based production
- Materials
- Clinker, concrete, clay
- Robot-assisted prefabrication of masonry and facade elements
Frick
CHTonwerke Keller AG: clay pit and works, Real Estate and MitLehm
- Materials
- Clay, clay minerals
- Works railway (double-rope circular ropeway, 1200 m, 40 wagons)
- X-ray diffractometry for clay analysis
Winterthur (Töss Plant)
CHProduction of facade and MitLehm elements
- Lot size
- Project-based production
- Materials
- Clinker, clay
Manufacturing and System Elements
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Prefabrication of masonry and facade elements (robot-assisted)Assembly | – | – | – | – | Clinker, Concrete, Clay bricks |
| Clinker facadesAssembly | – | – | – | – | Extruded clinker, Water-struck clinker, Re-Use clinker, Acoustic clinker |
| Prefabrication of preton facade elements / brick-faced elements / concrete elementsAssembly | – | – | – | – | Concrete, Clinker |
| Planning & execution (facade projects)Engineering | – | – | – | – | Clinker, Concrete |
| Facade refurbishment / facade cleaningSurface | – | – | – | – | Clinker, Facing brick, Natural stone |
| Hydrophobization / graffiti protection / maintenance inspectionSurface | – | – | – | – | Facing brick, Clinker |
| Partition, folding and fire protection walls / room-in-room systems (ImRaum)Assembly | – | – | – | – | Aluminium, Glass, Wood |
| Rammed earth elements ROBmade / clay brick elements (prefabrication)Assembly | – | – | – | – | Clay |
| Extraction and testing of clay/clay minerals (clay pits, X-ray diffractometry)Testing | – | – | – | – | Clay, Clay minerals |
| Real estate development, brokerage and managementEngineering | – | – | – | – | – |
3 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Robot-assisted prefabrication of masonry and facade elements | – | – | – | – | Pfungen |
| Works railway (double-rope circular ropeway, 1200 m, 40 wagons) | – | – | Route length 1'200 m | 1935 | Frick (Cheesleten pit to Frick works) |
| X-ray diffractometry (clay analysis) | – | – | – | – | – |
Additional services
Reference customers
Company History
- 1857
Founding of Keller Ziegeleien by Johann Jakob Keller.
- 1935
Construction of the works railway (double-rope circular ropeway, 1200 m, 40 wagons) between the Cheesleten pit and the works in Frick.
- 2015
Start of the sustainable development project 'Ziegeleiplatz Dättnau'.
- 2021
Production and distribution of backing and facing bricks transferred to Kubrix AG.