We guarantee:

■    That copper door and window match.

■    Perfectly: Testing at welding temperature.

■    Corner welds of sash and frame profiles require a temperature of 250°C. We test the temperature of the heat reflector and Teflon foils daily for perfectly interlocking.

■    That your copper door stays where it belongs: Corner testing of the copper door.

■    The welding joints of an aluminum-copper door corner joint must withstand a pressure of at least 4.000KN. We test this regularly. To ensure that your copper door stays where it belongs.

■    That rain, storm and snow stay outside:

■     Leak testing

■     The combination and the processing of profile, seal, and fitting, determine the tightness of a copper door. We always test the entire system and thus guarantee the consistently high quality of our products.