After cleaning the roads around the house, I am convinced of the Karcher K7. The patch again looks clean, algae, moss and other stains are gone. With delicate rock is recommended to start with less pressure so as not to damage the stone. What would be helpful in order to better handle with which winding hose can, is a cable reel (see other K7 models). If particularly dirty and uneven surfaces only helps the rotary nozzle, the surface cleaner is more suitable for smooth surfaces. The Vario nozzle is very helpful to clean the dirty wall to become the actual work, for example. All in all, a clear recommendation and a very good price / performance ratio.
