I had to clean a large wooden terrace which was filthy with moss, dirt, algae. Property there sMittel can imbibe the Kärcher and sprayed with little pressure on the surface. After a short time I have then with high pressure all wegbekommen well. After drying, the terrace was almost like re-laid and shone beautifully, even without oil. Works well, a wooden terrace'd Eich buy the agent again.
