
Manufacture of pumice and lightweight concrete blocks, basement blocks and construction panels for building

Bims- und Beton-Kellersteinwerk GbR. Geraedts + Co GmbH
NettetalNew on Amplifa
About GEKA Beton
The Bims- und Beton-Kellersteinwerk Geraedts + Co GmbH in Nettetal has been manufacturing concrete building systems under the GEKA brand since 1961. The product range includes lightweight concrete blocks (GEKA Therm), solid concrete blocks for sound insulation (GEKA Phon, GEKA Phon NL), concrete basement blocks (GEKA Unilath), jacket concrete formwork blocks, large-format construction panels, U-shell blocks for ring beams and levelling blocks. Products are made from pumice concrete, lightweight concrete and concrete. The blocks are characterised by heat storage and insulation properties, sound protection, fire protection and a tongue-and-groove system for fast installation. The products are certified with the Concrete Quality Mark, are tested in the in-house laboratory according to DIN and are monitored by independent testing institutes. The systems are distributed via building materials merchants in NRW; nationwide deliveries are available on request.
- Site
- Nettetal
- Processes
- Manufacture of concrete blocks (GEKA Therm lightweight concrete block), Manufacture of solid concrete blocks (GEKA Phon, GEKA Phon NL), Manufacture of concrete basement blocks (GEKA Unilath), Manufacture of jacket concrete formwork blocks, Manufacture of large-format construction panels (GEKA Therm construction panel), Manufacture of U-shell blocks for ring beams (GEKA Therm U-shell block), Manufacture of levelling blocks (lightweight concrete), Quality testing in the in-house laboratory according to DIN (Concrete Quality Mark)
- Materials
- Pumice concrete, Lightweight concrete, Concrete
- Certificates
- Concrete Quality Mark, CE marking
- Founded
- 1961
- Industries
- Construction industry, Residential construction, Basement construction, Commercial building materials merchants, Private customers
- 01
Concrete production
- 02
Block manufacturing (pressing/moulding)
- 03
Quality testing in the in-house laboratory
- 04
Warehousing
- 05
Delivery ex works or via building materials merchants
Materials
Pumice concrete
Used, for example, for the GEKA Therm U-shell blocks and offers excellent thermal insulation.
Lightweight concrete
Basis for GEKA Therm lightweight concrete blocks, construction panels and levelling blocks with high insulation performance.
Concrete
Material for solid concrete blocks, basement blocks and formwork blocks with high density and load-bearing capacity.
Site

Nettetal
DEHeadquarters / concrete plant
- Materials
- Pumice concrete, lightweight concrete, concrete
Building materials








Inside the production





Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of concrete blocks (GEKA Therm lightweight concrete block)Casting | – | – | – | – | Lightweight concrete, Pumice concrete |
| Manufacture of solid concrete blocks (GEKA Phon, GEKA Phon NL)Casting | – | – | – | – | Concrete |
| Manufacture of concrete basement blocks (GEKA Unilath)Casting | – | – | – | – | Concrete |
| Manufacture of jacket concrete formwork blocksCasting | – | – | – | – | Concrete |
| Manufacture of large-format construction panels (GEKA Therm construction panel)Casting | – | – | – | – | Lightweight concrete |
| Manufacture of U-shell blocks for ring beams (GEKA Therm U-shell block)Casting | – | – | – | – | Pumice concrete |
| Manufacture of levelling blocks (lightweight concrete)Casting | – | – | – | – | Lightweight concrete |
| Quality testing in the in-house laboratory according to DIN (Concrete Quality Mark)Testing | – | – | – | – | Concrete |
Additional services
Quality
All products are certified with the Concrete Quality Mark and are subject to regular monitoring by independent testing institutes. In addition, continuous quality testing is carried out in the in-house laboratory in accordance with DIN.
| Evidence | Nettetal |
|---|---|
| Concrete Quality Mark | |
| CE marking |
History
- 1961
Company founded; GEKA has advertised with "Quality since 1961" ever since.