Wikipedia presents the following specific methods for removing or minimizing algae growth:

• Reduction of water availability through drainage.

• Increase direct sunlight.

• Increase the amount and resources available to competing crops such as grass.

• Increase soil pH by applying lime.

• Heavy traffic or manually breaking moss plinths with oars

• Use of chemicals such as ferrous sulfate (for example on lawns) or bleach (for example on hard surfaces).

• When planting containers, coarse minerals such as sand, gravel and sawdust are used as a quick drainage treatment in container plants to inhibit moss growth. To get gutter cleaning services, you can visit

A common treatment for removing algae is zinc sulfate spread. This is a very effective method without blemishes. The zinc spraying process can take a maximum of several hours for most normal sized roofs. Depending on the weather, the six to eight hour period should then be allowed to dry out.

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The spray will wash your roof slowly with rain for about a year. The spray acts as a deterrent against future lichen outbreaks for at least one year to a total of four years.

If prevention isn't enough, consider maintaining a suitable moss cleaning service. They identify and replace broken tiles. Carefully remove only the part that is needed and reseal the adjacent tiles.

Commercially available fungicides are commonly used to kill algae infestations. After removal, a zinc strip or spray is applied as shown above to prevent future growth.