Every homeowner takes pride in their home's appearance. But there's one problem you may have noticed that may get worse over time—black roof streaks. These unsightly stains are caused by an algae known as Gloeocapsa magma. While it may seem like a cosmetic issue, black roof streaks can damage your roof and home. Let's look at the risks and the best ways to prevent algae on roof shingles.

What is Gloeocapsa Magma?

Gloeocapsa magma is an airborne algae, or cyanobacteria, that thrives in warm, humid environments. It's prevalent on homes throughout the United States and Canada and is the most common type of roof algae. Though it grows on many materials, it's typically found on asphalt shingles. Why? Asphalt shingles contain limestone and minerals like calcium carbonate. Gloeocapsa magma feeds off the calcium carbonate in limestone in the shingles, which can cause granule loss and deterioration over time.

Why Are The Algae Stains Black?

Gloeocapsa magma is usually blue-green. But as it grows on roofs, it can appear black or dark shade. It's not the bacteria that is changing colors. Instead, it is sensitive to UV rays, so the algae form a dark outer coating to protect it from the sun. 

The Risks of Black Roof Streaks

According to the Asphalt Roofing Manufacturers Association, there is no scientific evidence that algae is directly damaging to asphalt shingles. However, limestone and calcium carbonate are key to the stability and strength of the shingles. If left alone to grow, these black roof streaks can lead to granule loss and deterioration, causing them to tear, weaken, or become susceptible to debris and hail damage. The roof algae also absorb heat, which can increase the temperature in your attack and impact your electric bill as your AC works harder to cool your home.

How to Treat Gloeocapsa Magma

There are several ways to remove black roof streaks made by Gloeocapsa magma. Keep gutters clean as this roof algae often start growing at the roofline, and trim shading tree branches. Removing roof debris also helps prevent moisture buildup and algae growth. Roof algae remover products are also available for homeowners who prefer to treat the problem themselves. Keep in mind that DIY methods like bleach solutions are effective as part of a diluted solution, and high-pressure washing can further damage the shingles. Professional cleaning services use specialized equipment and solutions for safer and more effective results.

Euroshield Makes Algae-Resistant Shingles

The most effective way to prevent roof algae is to install a Euroshield Roof. Euroshield Shingles are made from 95% recycled material, 70% of which comes from recycled rubber, and are not affected by Gloeocapsa Magma. These sustainable and eco-friendly shingles are durable and can withstand extreme weather conditions, making them an ideal choice for homeowners who want a long-lasting and low-maintenance roof. 

If you need a new roof or are considering upgrading your roof to avoid black roof streaks while increasing protection against severe weather, request an estimate or talk to a certified Euroshield Roofing installer in your area.

Euroshield Is The Best Shingles For Your Roof

You can take steps to help minimize windstorm damage on your roof. Having the strongest, most wind-resistant shingle is your best defense. Euroshield Roofing provides superior wind performance, especially against uplift, straight line, derecho, or microburst. 

Euroshield roofing dominates other types of roofing with an industry-leading Class 4 impact rating against hail and wind speed resistance of up to 170 mph. Our unique tongue and groove design gives our strong rubber shingles the edge when it comes to wind resistance. Tested using the standard ASTM D3161/D3161- 14 and modified ASTM D3161 testing models, Euroshield products Rundle Slate and Ranchland Shake shingles easily held up against 150 mph for two hours, while Vermont Slate, Vermont Slate HP, and Beaumont Shake remained in place when faced with 160 mph winds for two continuous hours.

Get A Free Estimate For Euroshield Roofing

Euroshield can protect your family from dangerous weather while putting money back in your pocket when it comes to repairs. Also, our products are eco-friendly, made from 95% recycled material, and 100% recyclable. Find a Euroshield Roofing installer near you, or contact our team for a free estimate.