Remove Interlock stains – Whether your pavers are made of natural stone, concrete, or a combination of both, one thing is certain: they will become stained over time. Grease from barbecues and other oils will stain the porous stone surface. Unless you sealed the stones after installation then this is inevitable. Using a mild degreaser, wire brush, and pressure washer often these stains can be almost eliminated and blend in much better. Removing stains will even out the color, erase years of dirt and mold as well as help you remove the stuff between the joints. Some stains like efflorescence is the natural minerals leaching from the stones. This natural phenomena leave a crystal-like substance on the surface and can permanently stain pavers. The best prevention of efflorescence is a professional interlock installation with adequate grading and drainage. Read full home services article here.