Brick homes generally do not show dirt easily and therefore need little cleaning. In the event a brick home does become dingy or show signs of mold, you can usually clean it easily and inexpensively.
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Most of the time you need only rinse down the brick on your home with an ordinary garden hose. You can use a spray attachment if you would like to target a specific area. Stand 4 to 5 feet away from the house and spray the surface from side to side in a sweeping motion, beginning at the top.
Clean mold from exterior brick by first spraying with a garden hose. Mix a solution of 1 cup bleach to 1 gallon of hot water. Put on rubber gloves and scrub the moldy area with a scrub brush. Rinse with cool water from the garden hose, then allow to dry.
Use a power washer sparingly on exterior brick, as it can loosen mortar and cause damage to the structure. If you need to remove dirt or stains in a particular area, and a regular hose isn't doing the job, target only that section with the power washer. Set it to the lowest pressure setting necessary to clean the area and avoid causing damage.