How To Remove Algae From Your Roof

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February 11, 2020
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House roof cleaning with pressure tool. Worker on top of building washing tile with professional equipment. Moss removing with water.

Are you struggling with unsightly algae stains on the roof of your home? Has this made your home the eyesore of the neighborhood? Removing algae stains from the roof of your home is easy. Algae show up because of humidity. They only appear on the side of the roof which sees the most sun exposure.

First of all, regular household bleach is highly effective in removing algae from the roof. With a 50% mix of water and bleach apply to the services of the roof the bleach solution will kill the algae. No pressure washing is needed with this method, application alone is enough. If you don’t want to use chlorine bleach you can also use oxygen bleach. In some cases, regular household bleach can discolor the surface of your roof, so you may want to choose another chemical.

This can be applied with a sprayer and often many homeowners choose to have professionals treat these algae issues. This is because they don’t feel comfortable climbing their own roofs as it can be very dangerous.

Many homeowners believe that they should use the pressure washer to clean algae from their roofs. This is a very bad idea as a pressure washer can be damaging to the surface of your roof. The high pressure destroys the protective layer on the outside of your shingles that protects your home from UV rays. However, using a pressure washer with a lower pressure setting will do the job. You need to hire a professional pressure washing company to do this right and avoid any damage to your roof.

There are many other products out there on the market that are effective in removing algae especially if you’re afraid of bleach damaging your shingles. Some use sodium hydroxide or other chemicals to ensure that the algae do not come back.

Algae on the roof are different from the algae that were most familiar with. Algae rely on the sunlight to survive. They’re able to absorb nutrients on their own.

Also, don’t worry about algae causing damage to your roof. It’s just an annoyance, but most feel that it’s best to have it removed to be on the safe side because roof issues can be costly as the only thing that can result from algae is discoloration. This is because moisture is allowed to accumulate on your roof.

Finally, there are some things that you can do to prevent algae from forming on your roof. First, you can check your roof for debris and ensure that there are no moisture spots on the surface of your roof. You can also make sure that gutters are cleaned and taking moisture away from your roof. This is especially important if there are multiple homes in your neighborhood with algae on their roofs. If you find this to be the case, then the preventative maintenance is very critical to keep algae off your roof.