As with every roof tile, the functional guiding principle is, on the one hand, the best possible drainage of rainwater and difficult conditions such as storms and snow loads. On the other hand, criteria such as soiling, ease of processing and practical manufacturability are also taken into account. The dimensioning and design of the overlapping areas between the tiles are the features that determine the function and form. Aesthetically, the aim is to find the perfect balance between a modern, geometric appearance and a certain classic familiarity.