Mainka at a glance
Total output 2025
> 330
€ million p.a.
Founded
1895/1949
Branches
- Lingen (head office)
- Brunsbüttel
- Gelsenkirchen
- Cologne
- Münster
- Osnabrück
- Papenburg
- Wuppertal
Mainka employees
> 750
Accident statistics
Construction projects for chemicals, energy and logistics
We plan, construct, renovate and maintain industrial buildings safely, reliably and with many years of experience. Our focus is on complex projects in sensitive industrial environments such as chemical parks, power stations, refineries, energy infrastructure and large logistics sites.
Construction of the Covestro Campus Lot 1
Construction of the Covestro Campus Lot 1, Leverkusen
For our client Covestro, we constructed the Campus Lot 1 office building within the Chempark Leverkusen. The project included earthworks, reinforced‑concrete construction, façade works and extended pipeline works.
A particular challenge lay in the implementation of the light‑flooded atrium with its complex structural design, as well as the integration of reinforced‑concrete precast elements. Thanks to precise planning and close, partnership‑based collaboration, the building was completed on schedule — after more than 150,000 accident‑free working hours.
Figures and facts:
- Extended pipeline works
- Masonry works
- Earthworks
- Road construction / asphalt works
- Sewer and pipeline construction
- Reinforced‑concrete construction
- Reinforced‑concrete precast elements
| Customer | Covestro Deutschland AG |
|---|---|
| Location | Leverkusen, Germany |
| Contract value | approx. €11 million |
| Main construction period | 12 months |
Similar references
Of our more than 750 employees, around 60% are construction site personnel, whom we train regularly. On average, we devote 2% of annual working hours to training.
For whom and why?
We generate more than 90% of our turnover in the chemical, energy and specialised logistics sectors. Customers from these sectors trust in our experience because we construct complex industrial buildings reliably and safely.
