Of the walls

In order to reduce pressure on the window frame, it is better to acquire systems that have more than one sash. In some cases, the so -called deaf, completely closed frames can be used. It is also worth focusing on the entire length of the walls of the main profile, thick can be operated much longer. Absolutely any employee can close and open windows in the office, and not every employee will carefully relate to the window structure, should be checked without fail so that the mechanism responsible for opening and closing the windows is quite durable, reliable and simple.