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Frequently Asked Questions About Algae On A Roof

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If you look at your roof and see algae, you have many questions about where it came from, why it's there, and how to best take care of the issue. Getting answers to the questions you have will better help you to understand why it is there and what action you need to take.

Why is Algae on My Roof?

When you first spot algae, you may ask yourself where it came from and why it is on your roof. Algae can form on your roof for a number of reasons. The most likely reason is that your roof is wet and leaves are gathering on your roof. This creates the perfect breeding ground for algae. Your roof may be wet from a recent rain, because you live in an area with high humidity levels, or because your roof is retaining moisture. Additionally, the type of roofing materials you place on a roof can affect whether you get algae or not. Algae is most likely to develop on wood shakes or asphalt shingles. It is less likely to develop on ceramic tiles or metal roofs.

Should I Be Worried About Algae? When you spot algae on your roof, you will likely wonder if this is something you should be worried about, or something that is simply aesthetically unpleasing. When you spot algae, you should be concerned. Algae sucks the moisture out of your roofing materials in order to thrive and survive. And it spread quickly. This can leave your roofing materials dry and brittle, which can cause them to crack. As such, you want to remove the algae as soon as possible. Another downside to algae is that it can become heavy, especially when it rains. This puts additional stress on your roofs support beams and can damage them or cause your roof to cave in.

How Can I Remove Algae Myself?

The last question you may have when you see algae on your roof is how you can remove the algae yourself. Luckily, algae can be removed with a simple mixture of bleach and water. Mix equal parts bleach to water and then use a scrubbing brush to rub the mixture into the affected area on your roof. Continue scrubbing until the algae has lifted. From there, use a hose to rinse away the bleach mixture. If you are cleaning your roof with bleach, be aware that bleach can kill your plants and grass. As such, you may wish to cover these items with tarps before rinsing your roof. If you can't cover them, soak them in water to reduce the chances of them absorbing the bleach. Additionally, you need to be aware of the fact that bleach can lighten certain types of wood shakes. If you do not wish to use bleach, there are commercially sold products that can kill and remove algae on wood.

Once you have removed the algae from your roof, consider placing strips of copper or zinc along the peaks of your roof. When rain hits the copper or zinc, metal particles are spread throughout your roof. These particles can inhibit the growth of algae, which can prevent you from having this issue in the future.

Algae can be damaging to your roof. However, getting answers to the questions you have will help you know why this is and how you can remove the algae. If, after removing the algae, you notice cracked or damaged roofing materials, or if you are unable to remove the algae with bleach, you will need to call a roofing repair company to assist you. Those roofing materials will most likely need to be removed and replaced with new ones.

For more information on roofing repair and care, contact a company like All American Roofing Incorporated.


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