How to Clean Interior Brick Walls
- 1). Spread a plastic drop sheet on the floor under the wall. Raise one edge of the drop sheet up to cover the two lowest rows of bricks. Using waterproof tape, such as painter's tape, attach the drop sheet to the wall. This will catch runoff so it doesn't damage your floor.
- 2). Place grease-cutting cake or gel dish soap in a bucket with an equal amount of table salt. Add enough water so you can mix the ingredients into a thick paste. Liquid dish soap is also an option. If you use liquid soap, omit the extra water and add about 10 percent more salt than soap.
- 3). Dip a clean cloth into the paste and spread it on the wall to create a nearly opaque film. With a brass wire scrub brush, vigorously scrub the paste into the bricks. Let the paste soak in for 10 minutes.
- 4). Saturate a clean cloth in pure warm water. Wipe the soap-salt paste off the wall. Rinse the cloth frequently. For a large section of wall or a very dirty wall, change the water when it becomes noticeably dark.
- 5). Mix 1 tbsp. boric acid in a gallon of warm water. Dip a scrub brush in the solution and scrub the wall with a firm pressure. Let the solution sit for two minutes. Repeat Step 4 to remove the boric acid solution.
