As part of the obligation to provide a CE marking, every window manufacturer must provide practical verification that the building elements are airtight, water-tight and resistant to wind. The required test must be carried out by an accredited and certified testing agency. MACO operates as an external partner agency of gbd-lab GmbH. Window manufacturers can test their units directly for joint and watertightness at our test centre in Salzburg and receive an internationally valid test certificate. Tests for burglary resistance can also be carried out.