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Moss, algae, and lichen on your roof

Moss, algae, and lichen can all grow on a roof, especially in damp and shaded areas. While these organisms can add a natural and picturesque look to a roof, they can also cause damage over time.

Moss is a small, green plant that thrives in damp, shady areas and can be found on roofs, decks, and sidewalks. It can hold moisture against the surface of the roof, which can lead to rot and deterioration of the shingles. Moss can also block the flow of water through gutters, which can cause backups and leaks.

Algae are a type of simple plant that can grow on a roof, especially on asphalt shingles. They are usually black or dark green and can leave unsightly stains on the roof. Algae typically do not cause damage to the roof, but they can make the roof look dirty and unattractive.

Lichen is an organism that is made up of a fungus and an alga living together in a symbiotic relationship. They can grow on a roof and other vertical surfaces, and survive in harsh conditions. They are tough to remove and may cause damage to the roof.

If moss, algae, or lichen are left untreated for a long time, they can potentially shorten the life of the roof and make it more vulnerable to leaks and other damage. It's recommended to consult with a professional Soft Wash Contractor like Clean Rite Exterior Cleaning for the best method for removing these organisms and preventing them from growing back, as some of them can be treated chemically, but it's best to avoid that if possible since it can be harmful to the environment and health.

It's also important to address the underlying causes of moss, algae, and lichen growth on a roof, such as poor drainage and lack of sunlight. Improving the ventilation and insulation in the attic, cleaning gutters and downspouts, and trimming trees to allow more sunlight to reach the roof can all help prevent moss, algae, and lichen from growing on the roof in the future.


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