Spire light

The dormer is a mono-or multi-storey structure of an inclined roof. It has a gable roof and a private.

The gables is in alignment with the building's exterior wall. Wherein the dormer is different from the dormer positioned independently of the outer walls on the roof. The roof of the Zwerchhauses is often formed as a saddle roof. Meanwhile, First transverse ( diaphragmatic ) to the roof ridge of the main roof. According to the eaves of the main roof Zwerchdach and are perpendicular to each other. The dormer is covered by a Zwerchdach, which can be designed as a flat, tent, shed, saddle or hip roof.

Zwerchhäuser have already been built in the cities of the late Middle Ages (from the 14th century), once inside the city walls more memory, more rarely living space was needed. At high trusses supporting binder allowed the insertion of the cross gable and thus a better exposure of the roof space. Zwerchhäuser developed into a distinctive architectural element of the German Renaissance. They were built on the roofs of representative buildings and affiliated large roof areas. During this time, they were often decorated with different forms of colonnades, pilasters, cornices, volutes and windows. Since the 17th century, more and more attics were used by Zwerchhäuser.

Even today, roof structures are often implemented with Zwerchhäusern. You change a roof landscape much more than simple dormers or skylights. A subsequent roof construction may therefore come at the planning authorities or the preservation of monuments on objections.