Our WPC decking is now in its 3rd year and still looks great – and there are no haptic defects either. The floorboards are still splinter-free and undamaged. Only the green algae coating on the shady parts of the terrace was a nuisance during my tour in spring. Last spring, I had already sprayed the WPC decking with my Kärcher high-pressure cleaner and removed the dirt and algae deposits. It worked, but it left these ugly streaks on the wood.