How Do You Remove Green Moss From an Outside Brick Wall?


Green moss can make your exterior brick wall look unsightly. You may have more moss problems if your brick wall is moist and shaded, providing moss with an ideal growth environment. Cutting back overhanging trees and shrubs allows sunlight to penetrate and can reduce moss problems. If you have sprinklers, adjust them so they don't spray on your brick wall. For moss that is already on the wall, remove it using several methods.

Things You'll Need

  • Bleach
  • Water
  • Stiff-bristled brush
  • Pressure washer
  • Mix 1 part bleach and 9 parts water to make a 10 percent bleach solution.

  • Apply the bleach solution to a small, hidden area of the brick wall to check for any discoloration or damage. Leave the wall for one week to determine any effects from the bleach solution.

  • Apply the bleach solution to affected areas of the brick wall, if the bleach solution does not damage your brick wall. Use a stiff-bristled brush to remove the moss. Because moss has no roots, it comes up easily. If the bleach solution damages your wall, simply scrub the wall with the brush.

  • Use a pressure washer to remove green moss from large areas of the brick wall. Spray at a slight angle across the joints instead of straight into the joints to avoid damaging the wall.

Tips & Warnings

  • Wear rubber gloves and goggles for protection when working with bleach.


  • Photo Credit Medioimages/Photodisc/Photodisc/Getty Images
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