Below is a video showing how to clean bricks using oxygen bleach.
The bricks that the man in the video is cleaning are on a brick patio, and have mildew and algae all over them.
He does not suggest using a pressure washer to clean the bricks because he says the high pressure can harm the bricks, and the mortar in between. I have heard this statement before, and believe if you accidentally use too much pressure this is absolutely true.
His solution -- mix oxygen bleach, such as Oxiclean with warm water, and then put this solution onto your bricks and let it sit there for approximately 10 minutes.
He is not really specific about the amount of oxygen bleach to add to the water, but I would suggest 2-4 scoops of Oxiclean per gallon of water.
Then, use a scrub brush with a long handle to rub over the bricks, scrubbing off all the mildew, mold, moss or algae, along with dirt.
Then, just rinse off the cleaning solution with a garden hose and enjoy your clean bricks.
Here is the video for full details:
Tell me in the comments how these tips for how to clean bricks worked for you.
I can see how these tips would be easier to use for brick surfaces which lay flat, such as patios and walkways. It would be much harder to use these tips for vertical walls made of brick, both to let the solution sit on the surface, and also to scrub.
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