Exterior stoneware cleaning without chemicals. • Natural and artificial stone • Paving and cobble stone • Porcelain stoneware and ceramic slabs • Wood and WPC terraces • Walls made of stone and wood • Steel railings and metal covers We clean your driveways, terraces, walkways, stairs and concrete or stone walls and rid them of moss, lichen, algae, dirt and weeds, even chewing gum. A treatment against the return of moss as well as impregnation (= lotus effect) is also possible