# Dormer

Dormers essentially consist of their own building outline (hereinafter referred to as dormer contour). This dormer contour is assigned the corresponding attributes used to centralize the dormer. However, this dormer contour is not visible because it cannot be modified manually. After the dormer is centered, it is intersected with the main roof. Only then does the actual dormer geometry arise.

The same result would be obtained if the dormer contour were entered manually as a normal building outline. For a trapezoidal dormer, however, this would already become very time-consuming. In addition, a dormer does not consist only of the roof surfaces. If walls or the main roof opening are entered in the dormer input, these elements belong to the dormer. If windows are also entered in the dormer walls or structural members in the walls or roof surfaces, these elements likewise belong to the dormer. If the dormer is moved or adopted, all elements that belong to the respective dormer are carried along.

All components of a dormer automatically belong to a package.

A dormer can be modified at any time via the dormer module. If the main roof surface is changed, the dormers located on it adapt immediately.

Dormers can be placed on top of each other (in sequence) on a main roof surface. It is even possible to place a dormer on a dormer surface. Users without the 'Roof Surface Cutting' module can only place dormers within a roof surface. Exceptions are fold lines, over which a dormer may protrude at any time. Users with the 'Roof Surface Cutting' module can place dormers arbitrarily. This also allows dormers to protrude from the main roof surface at any desired location.

If a dormer is placed at the edge of a main roof surface in such a way that no hole is created within the main roof surface but rather a bay, certain considerations must be observed. The bay is not passed to the measurement as an opening. When deleting or moving the dormer, the bay remains, because hole lines cannot simply be deleted; instead new main roof lines would have to be created and merged.

Thus, a dormer has a considerable number of properties that in most cases facilitate work. In individual cases, it may be advantageous to be able to manipulate a placed dormer to adapt it to specific circumstances. In this case, the dormer can be dissolved. It then retains its geometry and all timbers; nothing is lost. However, it is no longer a dormer but an independent building outline. This 'dormer' can no longer be edited as a dormer, but all manual modifications can be made as with any other building outline.
