How to clean exterior brick

A solution of one cup of bleach mixed with a gallon of water can be applied with a scrub brush can be used to clean most problem areas. Use a natural or synthetic bristle brush (wire brushes leave traces of steel behind that will rust and discolor the bricks).

Mix equal parts vinegar and water and pour into a spray bottle. Spray on the bricks and let is sit for a few minutes. Use a sponge mop to clean the bricks. If the bricks are very dirty, use a nylon-bristled scrub brush and put some elbow grease into the scrubbing.

Don’t Use High-Pressure Power Washing

Pressure washers can damage the surface of an entire brick house. You cannot pressure wash brick on high pressure settings. It may take a couple of years for you to realize that the brick was damaged.

Spray the brick down with a garden hose with a spray attachment. The sharp spray from the hose removes surface dirt and dust, but with less force than a power washer. Soak the brick thoroughly before further cleaning.

Never use vinegar on any kind of paver, brick, flagstone or concrete; it WILL damage the surface.

Bleach. Unsightly mold, mildew, and moss on exterior brick walls and pavers are no match for the stain-fighting and brightening properties of chlorine bleach. While wearing rubber gloves, combine a tablespoon of bleach with a gallon of warm water in a bucket.

Bleach (For Mold, Mildew, and Moss): A bleach mixture is ideal for removing mold, mildew, and moss from exterior brick walls. Combine a tablespoon of bleach with a gallon of warm water in a bucket, then apply the bleach with a sponge to the brick. Use a scrub to tackle hard-to-reach areas or difficult stains.

The vanadium salt turns green when it crystallises in an acidic environment, such as after acid cleaning or exposure to rainwater, Which naturally acidic. This process can occur whenever the bricks are subjected to excessive water from rain either before or (more often) during the bricklaying process.

Fill a bucket with equal parts chlorine bleach and water. Dip a stiff scrub brush into the solution. Scrub the moldy spots on the brick vigorously with the brush and bleach. Rinse the scrub brush in the bleach solution frequently.

Step #3: Use Vinegar

Let the vinegar sit for about 5 minutes then scrub it off using a stiff-bristled brush. Then rinse the vinegar with hot water and spray the area again. This time, you don’t need to rinse away the vinegar; leave it to let it penetrate the brick and kill the mold that’s on the interior.