# Roof Layout

Roofs can be created using various methods. A classical and in most cases very effective method is roof determination. In roof determination, a building outline is entered. Each line of the building outline is assigned the so‑called roof attributes. With this information, the program can determine a roof surface for each side of the building, which will also intersect with the others during this determination. Only by considering all roof surfaces together can certain roof surface geometries be identified.

If multiple building outlines with their own roof surfaces are entered, they will automatically intersect with each other depending on the specified intersection priority.
