Rolling Machines

    A window has many tasks to perform. It must be transparent to allow sunlight to pass through. It must open and close to allow ventilation. It must be soundproof so that the noise from the street cannot get inside the house. But it is just as important that a window insulates as well as possible.

    A consistent feel-good atmosphere can only be achieved by constant temperatures. Whether it is cold in winter or hot in summer – people want a pleasant indoor temperature inside the building.

Gelmen will be happy to tell you more about such facts.