Dormer

A dormer, dormer short, sporadically dormer (or dormer ), which in Austria and Switzerland Dachkapfer Dachlukarne, is a roof structure in the sloping roof of a building.

The dormer window is used for lighting and ventilation of roof spaces. For this purpose, located in the dormer windows of residential buildings in general window. At the same time increases a dormer the usable space in the attic.

The front side of the dormer window is of the eaves of the main roof in the direction of the roof ridge and has no structural connection is reset to the underlying outer wall.

While in historic dormers the front side lying parallel to the ridge and eaves was only glazed, the lateral surfaces of the dormer, the two (usually vertical ) dormer cheeks glazed today sporadically.

Forms of dormers

Dormers generally have a dormer roof and a gable, inspired by the shape of the main roof, so for example, a gable roof or a hipped roof with a ridge and two horizontal, lateral eaves. We also speak of the saddle ( roof ) or hipped dormers ( roof ) dormers. If the gable wall of the dormer ends above the gable roof of the dormer means talking of gable dormers. These common types always have two dormer dormer cheeks, jaws and roof -called side walls in the shape of right triangles. It is characteristic of a dormer that none of its pages is in connection with the example, brick building, which represents the actual house. A dormer builds constructively always on the roof.

Dormer

Drag Gaube (straight)

Drag Gaube ( oblique)

Drag Gaube (lying)

Bat dormer

Pointed dormer

Roof skylights

Tons Gaube

In more recent times, increasingly dormers are built with a flat roof, strictly speaking, it is usually a very flat "backwards " sloping roof, often with a metal covering that back - is drained by a throat - so to go main roof area.

In addition, however, there are also numerous special forms:

• Drag Gaube: The face is a rectangle, the roof is a pitched roof with a smaller slope than the main roof, the dormer cheeks are triangles in which there is no right (90 °) angle. Drag dormers are the oldest form of the dormer. Originally a horizontal vents to dry in the roof space of goods, all later dormer forms developed from the towing dormer. Very wide drag dormers are also called roof pike, pike or pike dormer window.
• Fledermaus Dormer (sometimes referred to as Froschmaul dormer or ox- eye): The top of the front side forms a curved shape, similar to a sine curve, there is no dormer cheeks.
• Pointed dormer (also triangular dormer ): The face is a triangle, the roof is a gable roof, there is no dormer cheeks.
• Arched dormers: The face is half round above limited, the roof is a barrel roof, there is not in every case dormer cheeks.
• The light dormer is a well glazed dormer.

Gaube, on the former restaurant " Hietzinger Winery " Hietzing (Vienna)

Light dormer windows of a residential building in Berlin

Distinction dormer / Zwerchhaus

Dormer roof with cross

A dormer is a transverse ( = " diaphragmatic " ) to the main roof deferred roof structure. In contrast to the gable dormer be completed with the house wall and can also be carried out several floors. The First of Zwerchhauses is not pulled up to the ridge of the main roof; by the Zwerchdach differs from the cross roof. The Zwerchdach can be both a gabled roof and flat, hipped, shed or barrel roof. Other names for a dormer are Dwarf House, Dormer, Switzerland and the corresponding French term dormer window.

A dormer sits in contrast to the dormer behind the outer wall to the rafters. In some cases it may be difficult to make a clear distinction between the dormer and dormer. The difference, however, can be derived constructively. The building law of some countries is the distinction, for example ahead in the distance area calculation.

Dormer on the Ferry House, Ebey 's Landing ( Washington state )