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What is Roof Algae and How to Fix it?

Oct 25

Your roof can accumulate more than dirt and leaves. Your roof could develop algae if it is left to its own devices. Different types of algae, lichens and fungi can grow on a roof. Many homeowners mistakenly think algae is "roof mold." However, in most cases, it is a blue-green algae that leaves dark streaks when it dies.

Algae can leave unsightly growths and stains on your roof. You should invest in professional cleaning to prevent it from worsening yearly. This comprehensive guide is by spring valley roofing company.

Residential roofing contractors will teach you how to identify roof algae and the possible hazards it can pose to your home. They also help you know when to call the pros for roof repairs, replacement, or deep cleaning. Free roof inspections are available at all locations in the country.

How to recognize Roof Algae

What does roof algae look and feel like? It all depends on what type of problem you have. Roof algae is most often seen as discoloration of roofing materials. There may be black streaks or spots or green mossy growth. Roof algae can look similar to mold spots, which is why it's so common. Mold can grow on your roofing materials if there is water trapped. If you notice any of these signs, algae are likely the problem.

  • Black Streaks
  • Spots in green or white
  • Round lichens
  • Mosses
  • You can spread green moss all over your roof

Algae is not the same thing as mold. Algae can be more common than mold and are not as harmful to people. Algae can take over a roof within four years if the conditions are right. Contact a local roofing contractor if you notice unusual discoloration or vegetative growth on your roof. Contractors can help you determine if there is algae on your roof and suggest the best way to address it.

What causes roof algae?

Algae, a non-flowering aquatic plant, does not have roots and leaves like other plants. Roof algae can develop in specific environments. Algae thrive in moist environments where heat and humidity are combined. Algae thrive in damp, shaded areas such as under large trees. Surviving your property also requires nutrients. The limestone filler in roofing shingles can provide nutrients for algae spores. Your roof's inorganic materials will allow the algae to spread to other areas and survive.

A single spore can bring about roof algae or fungus in most cases. If the weather is favorable enough, the wind can blow a spore onto your roof. Although algae can be more likely to develop in rainy weather, it doesn't need rain as long as there is enough humidity. Roof algae can be caused by overhanging branches, blocked gutters, standing water, poor roof ventilation, and porous roofing materials. Clearing your roof of any common problems can help prevent algae growth.

How to get rid of roof algae

Roof algae can be prevented by taking preventative measures. While you cannot stop the wind from spores being deposited onto your roof, you can control the growth of the spores. Make your roof an unfriendly environment for spores. Reduce the number of branches that hang over your roof to increase sunlight. Regular roof and gutter maintenance are necessary to ensure your roof wicks away water as efficiently as possible. If you live in an area with high humidity levels, it might be worth paying more for algae-resistant roofing materials. You can also treat your shakes or shingles with moisture-resistant chemicals.

It is best to treat the problem immediately if it is too late. You should not try to remove algae from your roof by yourself. Do-it-yourself roof algae cleaning using bleach and water can lead to costly roof leaks or moisture trapped under your shingles. If you aren't careful, it could pose a health risk. Unprofessionally removing the fungus could cause damage to your shingles, strip them of their granules, and create unsightly bald patches. Roof algae repair should only be left to professionals.

When to call Roofing Professionals

A licensed roofer can help you deal with your roof algae problem. An expert like a spring valley roofer can inspect your roof, identify any underlying problems, and clean the top so that it does not cause more damage. The contractor will then suggest ways to prevent algae growth in the future, such as gutter replacement or special roof coatings. Contractors can arrange repairs if algae has damaged your roofing system. Contact a roofing professional immediately if you see signs of algae growth on your roof.