What is Gloeocapsa Magma?


Gloeocapsa Magma. Sounds like a supervillain, and to some homeowners, it might be. Gloeocapsa Magma is an algae that causes dark streaks, black spots, and other discoloration on the roof.

You’ll likely notice the dark spots first on the north side of your roof, or in areas with more tree coverage. Since this algae thrives in humid places—and since the Ozarks can be quite humid—you’re likely to see it on rooftops throughout the area. And should this algae come to your neighborhood, it will likely end up on your roof, as it spreads through air. So what’s the good news? While it might look alarming, the algae is more an aesthetic nuisance than a direct threat to your roof. But don’t get too comfortable—if left untreated, the algae can prematurely age your shingles. You might be tempted to clean your roof yourself. We advise against this. A high-pressure power wash can do some serious damage. And if algae and fungus join forces, you’ll have lichen on your hands, which is extremely difficult to remove.

The best solution? Call a professional.

There are options to help prevent black spots. Copper flashing, for example, contains minerals that prevent algae growth. It is important to note, though, that if algae is in the shingles, it will likely return down the line. When that happens, Dale’s Roofing is just a call away.

For more information, contact the professionals at Dale’s Roofing. We’ll help determine the best course of action for your home and budget.


Fill out the form below, and we will be in touch shortly.

    A member of the Dale's team will call you soon to finish setting up your DRI Maintenance Club membership.