The selection of a suitable system is very important for the sound installation of stone and ceramic on balconies and terraces. Due to different expansion of the materials used, stresses occur in the build-up of the layers, due to the temperature changes experienced. These must be permanently compensated for so that there is no break within the build-up of the layers. Furthermore, dependent on the temperature exposure, the length of edges in the tiled bays should be restricted from 2 – 5 m. The aspect ratio of the tiled bays should be as squat as possible from up to 1:2.