Building cleaning and facility services for offices, industry, clinics, schools and hotels – since 1965, now in its third generation.
gewa-Gebäudereinigung (gewa-Unternehmensgruppe)
Oberhausen (Headquarters) · Gelsenkirchen · Würselen · Erftstadt · Dortmund · MunichNew on Amplifa
About gewa-Gebäudereinigung
gewa is a family business for building cleaning and facility services founded in 1965 by Hermann Thielen in Oberhausen, today managed in its third generation. With around 2,800 employees at six sites (according to WLW, the group has more than 3,400), gewa cleans office buildings, production halls, clinics, schools, hotels and retail spaces. The service portfolio includes routine cleaning, glass and window cleaning using the osmosis method, façade and construction cleaning, industrial and machine cleaning during ongoing operations, as well as deep and special cleaning and housekeeping for hotels and apartment complexes. In addition, the group offers winter services, green space maintenance, flushing services, hygiene and dust control mat service, pest control via the subsidiary Parasita, as well as security services, reception services and catering. Services are documented digitally via the e-QSS quality assurance system; the company is certified to DIN EN ISO 9001 and ISO 14001. The headquarters is located at Fahnhorststraße 13 in Oberhausen.
- Site
- Oberhausen
- Processes
- Routine cleaning (offices, kitchens, sanitary facilities, corridors), Glass & window cleaning (osmosis method), Façade & construction cleaning, Industrial & machine cleaning, Deep & special cleaning (carpet, floor, ceiling, lamp cleaning), Housekeeping, Production of prefabricated garages, carports, garden sheds and halls made of wood and metal, Renovation and modernization work on garages
- Materials
- Wood, Metal, Routine cleaning, Glass and window cleaning (osmosis method), Façade and construction cleaning, Industrial and machine cleaning, Deep and special cleaning, Housekeeping
- Certificates
- DIN EN ISO 9001, ISO 14001, e-QSS quality assurance system
- Founded
- 1965
- Employees
- approx. 2,800
- Industries
- Office buildings, Production halls/industry, Clinics, Schools, Hotels, Retail spaces
- 01
On-site site inspection
- 02
Scope of services by area
- 03
Routine and special cleaning
- 04
Digital documentation via e-QSS
- 05
Complaint management with deadlines and escalation paths
Services and Methods
Routine cleaning
Regular care of offices, kitchens, sanitary facilities and corridors at the agreed intervals.
Glass and window cleaning (osmosis method)
Chemical-free cleaning of glass and frame surfaces inside and out using environmentally friendly methods.
Façade and construction cleaning
Material-appropriate cleaning technique per façade material as well as intermediate and final cleaning during construction work.
Industrial and machine cleaning
Professional cleaning of machines and industrial systems matched to production processes.
Deep and special cleaning
Deep cleaning as well as special cleaning such as carpet, floor, ceiling and lamp cleaning.
Housekeeping
All-round service concept for hotels and apartment complexes.
Facility services
Winter services, green space maintenance, flushing services, mat service, pest control, security, reception and catering.
Locations
Oberhausen
DEHeadquarters
Gelsenkirchen
DEBranch office
Würselen
DEBranch office
Erftstadt
DEBranch office
Dortmund
DEBranch office
Munich
DEBranch office
Service Areas
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Routine cleaning (offices, kitchens, sanitary facilities, corridors)Surface | – | – | – | – | – |
| Glass & window cleaning (osmosis method)Surface | – | – | – | – | Glass |
| Façade & construction cleaningSurface | – | – | – | – | – |
| Industrial & machine cleaningSurface | – | – | – | – | – |
| Deep & special cleaning (carpet, floor, ceiling, lamp cleaning)Surface | – | – | – | – | – |
| HousekeepingAssembly | – | – | – | – | – |
| Production of prefabricated garages, carports, garden sheds and halls made of wood and metalAssembly | – | – | – | – | Wood, Metal |
| Renovation and modernization work on garagesAssembly | – | – | – | – | – |
| Winter services, green space maintenance, flushing services, hygiene and dust control mat service,Surface | – | – | – | – | – |
Additional services
Reference customers
Quality and Certification
Services are documented via the digital e-QSS quality assurance system and can be viewed by customers at any time. gewa is certified to DIN EN ISO 9001 and ISO 14001; a fixed process with deadlines and escalation paths applies to complaints.
| Evidence | Oberhausen |
|---|---|
| DIN EN ISO 9001 | |
| ISO 14001 | |
| e-QSS quality assurance system |
History
- 1965
Founded by Hermann Thielen in Oberhausen
- 2005
Foundation of Gewa Garagenbau GmbH (according to WLW/Kompass; since ceased to exist)
- 2011
Press release by Gewa Garagenbau GmbH on the subject of carport and garage construction
- 2025
60th company anniversary of the gewa-Unternehmensgruppe