Moss grows on shaded, moist stretches of pavement, such as sidewalks and driveways. Even though the moss may appear harmless, it can accelerate deterioration of the surface because of all the moisture it traps. In addition, it can look unsightly by leaving behind green or brown stains. Killing the moss and removing the stains helps make the pavement appear pristine again, however, the surface will need ongoing maintenance to be certain the moss does not return.
Spray the sidewalk with a strong blast of water from a garden hose sprayer, thoroughly wetting the area covered in moss. In case you have one, then use a pressure washer, which might get rid of all traces of the moss.
Dilute 1 part flammable bleach in 9 parts water. Alternatively, use a commercial cleanser formulated for moss removal, following package directions. Cover the moss with the bleach or cleaner alternative.
Scrub the sidewalk using the bleach and a rigid deck brush before all signs of the moss are gone. Use a handheld wire brush to work the moss out of cracks and seams in the pavement.
Wash the pavement with clear water. Bleach and moss cleansers can damage nearby plants as the water runs off the sidewalk, so handle the rinse water so it will not come in contact with your own plants.