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Two Methods For Removing Moss From Your Roof

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If your roof is frequently shaded by tree branches, chances are good that it will begin growing moss. To curb the moss growth permanently, you'll have to trim away those tree branches to expose the roof to more sunlight. In the meantime, however, you'll need to focus on removing any moss that is currently present. Here are two simple ways to do that:

Method 1: Bleach and Water

When to use it: This method is the easier of the two, but it should only be used when you are not worried about killing any plants surrounding your home. The bleach water will run off the roof and kill any grass or plants it comes into contact with.


  1. Pour 1 cup of bleach into a large 5-gallon bucket, and fill it the rest of the way with water. You may wish to do this while you're already on top of the roof. It's easier to drag a garden hose and bucket onto the roof than it is to tote a filled bucket of water up the ladder.
  2. Start at the peak of the roof, and use a sponge to generously apply the bleach water to any moss. Make sure you soak the moss thoroughly. Work your way down the roof, applying bleach water as you go.
  3. When you've bleached all of the moss, let the bleach take effect for a few days. The moss should first turn yellow and then brown. Now that it is dead, it will come away from the roof more easily.
  4. Stand on a ladder and reach onto the roof with a large broom. Use it to sweep the moss off the roof. It should come away quite easily, though there may be a few areas you have to rub back and forth a little to loosen.

Method 2: Physical Force

When to use it: If your home is surrounded with delicate or valuable plants, then you'll have to use this chemical-free method of moss removal. It takes a bit longer and requires more work but will be effective in the end.


  1. Stand on a ladder at the edge of the roof, and use a broom to "scrub" back and forth over any moss you see, loosening it.
  2. Sweep the loosened moss debris off the roof.
  3. Climb onto the roof with a putty knife, and use it to loosen any moss that you were unable to scrub away with the broom. Stick the knife under the edge of the moss, and pull up to free it. Be careful not to pry any shingles off the roof.

For more information, contact Cleroux & Sons Roofing pitched roofs or a similar company.