Moss grows on surfaces that are moist and shady. A brick patio that doesn't receive a significant amount of sunlight throughout the day often will become an environment that is conducive to moss growth. This can stain the patio and pose a health hazard because moss can be quite slippery. Removing moss that has grown on a brick patio is possible with a little elbow grease and time.
Use a hose to wet the moss-covered brick patio. You do not need to drench the patio, just wet it enough to moisten it.
Fill a spray bottle with 266ml. water and 29.6ml. bleach.
Spray the bleach and water solution on the moss.
Scrub the area with a brush that has stiff bristles.
Rinse the area with water. Make sure you rinse all the bleach off of the patio.
Wear protective gloves and glasses to avoid damage to your hands and eyes from the bleach. If you have never used bleach on your brick patio before, test a small area to make sure it doesn't have any undesirable results on the brick's colour or surface.