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The Roto Group – leading the way for over 75 years


A name that stands for innovative, individual and secure complete solutions with a system in architectural hardware technology the world over. Developed by a team of designers and engineers who are among the world's best.


But additional properties are required to achieve decades of success on the world market: Experience, trust, curiosity, the will to succeed, foresight, dynamics, creativity, knowledge and skill.

Window & residential door systems


As an end to end provider, KÖMMERLING presents an extensive range of window and shutter systems that is a clear cut above the competition. Our widely diversified range of systems also provides the basis for creative solutions tailored specifically to quite individual needs. In addition, the KÖMMERLING brand is a leading manufacturer of PVC-U sheets for the most diverse applications. This line of quality products marketed worldwide forms a strong unit in the profine Group. The range is rounded off with customised profile systems for the semi-finished products sector. 

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