We offer a wide range of quality products that ensure an excellent performance in terms of functionalities and display.
At KOSI, the aluminium openings have many benefits with regards to maintenance, thermal and sound insulation and as well as on the ecological aspect.
Nowadays KOSI, put forward a broad range of doors and casement, sliding or folding windows, transoms, glass windows and manual or motorized louvers.
All the products are assembled according to strict European standards and the power coating has a warranty period of ten years. Our openings are designed to resist cyclonic winds up to 280km/h and are totally water tight.
We are very proud of our circular and arched openings.