Over the seasons, driveways, walkways & concrete surfaces get dark and slippery. This happens because mold and mildew cling to the surface, allowing dirt and algae to build up and create a layer of filth on concrete. Concrete cleaning is necessary in the pacific northwest, as organics thrive in the rainy seasons all over your home & business. We first treat the concrete and kill the source of the problem, which loosens up all the dirt and grime before we surface clean & pressure wash. After the concrete is clean, we then post treat the concrete with solution to brighten up & prevent any mold from coming back for a long period of time. Leaving your concrete driveway/walk ways dirty will create a very slick and hazardous place to walk. Not only is it dangerous, its also makes your home or business look filthy! Mossbrothers also offers oil spill & rust stain removal. Oil & rust stains are penetrated deep into the concrete if left alone for a long period of time. Oil spills & rust stains require commercial grade equipment & solutions to lift up and remove from the concrete surface.