How to Remove Moss & Lichen From a Roof

Moss and lichen growth on your roof is unsightly. This green, gray or white growth diminishes the appearance of the exterior of your home. They tend to grow on parts of the roof that are exposed to little or no sunlight. Moss and lichen will spread farther on the roof if left untreated, and can even cause the roof to weaken over time. Clean moss and lichen from your roof at first sight to prevent damage from occurring.

Clean moss and lichen from your roof to keep your home looking neat and to prevent damage.
  1. Pour 1 gallon of water into a bucket. Add 8 oz. of oxygen bleach. Use a long-handled spoon to mix up the ingredients.

  2. Transfer the cleaning solution to an empty garden sprayer. If your garden sprayer is large enough to hold an entire gallon of water, mix the solution up in the garden sprayer instead of the bucket.

  3. Use a garden hose to wet the roof thoroughly. Apply a liberal amount of the cleaning mixture onto the roof while it is wet. Let the cleaning solution remain on the roof for 20 minutes.

  4. Scrub the moss and lichen spots off the roof with a long-handled scrub brush.

  5. Rinse the cleaning solution from the roof with water from the garden hose. Rinse from the top of the roof down. Apply the oxygen bleach solution again, then scrub and rinse, if the roof is not clean after the first attempt. Depending on the severity of the moss and lichen, more than one application may be necessary.

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