Swiss joinery for certified fire protection doors EI30–EI90, partition wall systems, interior fitting and solid wood manufacturing
Koster AG Holzwelten
9212 Arnegg (production, office, showroom) · St. Gallen (showroom)New on Amplifa
Second-generation family business
Koster AG Holzwelten is a second-generation joinery based in Arnegg near St. Gallen with around 55 employees. The company manufactures and installs certified fire protection doors of classes EI30 to EI90, fire protection curtains, flood protection and sound insulation solutions as well as interior doors and interior glazing – mainly for hospitals, schools, hotels, administrations and public buildings in Eastern Switzerland. The portfolio is complemented by relocatable partition wall systems from the partner feco, interior fitting and conversions up to heritage protection upgrades, as well as the manufactory products bogengut® (straight tabletops made from curved wood) and Myrai (marble wood). Production is carried out on a 5-axis CNC machining centre with a 7280 × 1650 mm working area combined with craftsmanship; domestic woods such as oak, ash, Swiss stone pine, Weymouth pine and curved wood are processed. Installation and service are provided by the company's own installers from a single source. In association with the Feuerschutzteam, the company holds more than 100 of its own fire protection test certificates.
- Site
- Arnegg
- Processes
- Fire protection doors EI30–EI90 (frame doors, sliding doors, glazing, heritage protection upgrade), feco partition wall systems (solid wall, fecofix glass elements, double glazing), Interior fitting & conversion (kitchens, bathrooms, built-in cabinets, renovations), bogengut® – solid wood furniture made from curved wood (process for producing straight tabletops, Sound insulation doors/elements (41 dB / 47 dB), Acoustic ceilings (perforations, sheep wool insulation), Fire protection (doors EI30–EI90, fire protection curtains, glazing, flood protection), Partition wall systems feco
- Materials
- Oak, Ash, Weymouth pine, Swiss stone pine, Curved wood, Marble wood (Myrai), Aluminium, Weymouth pine (moon wood)
- Certificates
- Fire protection test certificates EI30 to EI90 (100+ own certificates in, Fire protection test certificates EI30–EI90 (100+, Feuerschutzteam association)
- Founded
- 1987
- Employees
- 55
- Industries
- Hospitals & Care, School Construction, Hotels & Gastronomy, Commercial & Administration, Public Buildings, Heritage Protection
- 01
Planning & Construction
- 02
CNC Production
- 03
Craftsmanship
- 04
Quality Inspection / Fire Protection Certification
- 05
Installation by Own Installers
Materials & Woods
Oak
Veneer and solid wood for counters, doors and furniture, e.g. natural lacquered oak veneers.
Ash
Veneer wood for doors and glazing, e.g. solid frame doors with round glass cut-outs.
Swiss stone pine
Alpine softwood for manufactory products and interior fittings.
Weymouth pine (moon wood)
For acoustic ceilings with fine perforations and sheep wool insulation.
Curved wood
Raw material for bogengut® solid wood furniture – process for producing straight tabletops.
Marble wood (Myrai)
Swiss wood patterned by fungi for furniture and accessories.
Aluminium
Frame profile for feco partition wall systems with glass elements and double glazing.
Locations
Arnegg
CHProduction, office, showroom (registered office)
- Lot size
- Project business, 100+ elements/project
- Materials
- Oak, ash, Swiss stone pine, curved wood
- 5-axis CNC machining centre (7280 × 1650 mm)
St. Gallen
CHShowroom for furniture, interior fittings and feco partition walls
Services & Components
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Fire protection doors EI30–EI90 (frame doors, sliding doors, glazing, heritage protection upgrade)Installation | – | Elements up to 5.5 m height | – | 100+ elements/project proven | Wood, Ash (veneered), Oak (veneered), Steel (frames) |
| feco partition wall systems (solid wall, fecofix glass elements, double glazing)Installation | – | – | – | – | Aluminium, Glass |
| Interior fitting & conversion (kitchens, bathrooms, built-in cabinets, renovations)Installation | – | – | – | – | Wood, Oak |
| bogengut® – solid wood furniture made from curved wood (process for producing straight tabletopsInstallation | – | – | – | – | Solid wood, Curved wood |
| Sound insulation doors/elements (41 dB / 47 dB)Installation | – | – | – | – | Wood, Glass |
| Acoustic ceilings (perforations, sheep wool insulation)Installation | – | – | – | – | Weymouth pine (moon wood), Sheep wool |
1 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| 5-axis CNC machining centre | – | 1 | 7280 × 1650 mm working area | 2022 | Arnegg |
Additional services
Reference customers
Fire Protection Certification
In association with the Feuerschutzteam, more than 100 of its own fire protection test certificates from EI30 to EI90 are available, tested nationally and internationally. Projects such as the Bernhardzell fire brigade training centre were developed jointly with the Feuerschutzteam.
| Evidence | Arnegg |
|---|---|
| Fire protection test certificates EI30–EI90 (100+, Feuerschutzteam association) |
Milestones
- 1987
Founded on 5 January in Abtwil, St. Gallen, together with Markus Hautle – with 7 employees.
- 1988
Partnership with feco-Federle GmbH.
- 1998
Relocation to Waldstatt AR with 15 employees.
- 2001
Renaming to Koster AG Holzwelten.
- 2005
Expansion of machinery and IT; team grows to 25 employees.
- 2012
Opening of the showroom in St. Gallen.
- 2015
World first bogengut® – straight tabletops made from curved wood.
- 2017
Acquisition of Lehmann Arnegg AG; unification of production, office and showroom in Arnegg; more than 100 fire protection test certificates in association.
- 2021
Tobias Koster takes over management.
- 2022
New 5-axis CNC with 7280 × 1650 mm working area.
- 2023
Office conversion of project management with feco partition walls and acoustic solutions.
- 2026
Establishment of the executive board (Tobias, Beda, Severin Koster, Urs Weiler) as of 1 January; new break room in Arnegg.