Black Algae On Siding

Green stainsare almost always the result of algae or moss.

Black algae on siding.

But testing is probably not justified. You re most likely to see green stains on siding that is inadequately ventilated. Also known as artillery or cannonball fungus sphaerobolus it uses internal water pressure to forcefully fire its spores similar to seeds up to 20 feet away. A microscopy lab examination of a sample from this surface would be needed to know for sure.

Usually appearing as a scaly growth it can grow on any type of siding. Wet and forget is as simple as spraying your outdoor surface and leaving it. Black stainsare usually a sign of mildew algae mold or fungus. Black algae can grow there as well as in areas with direct sunlight due to its protective coating.

Fortunately algae on vinyl siding will not affect the function of your siding or cause it decompose. Green stains clean up in 1 2 weeks black stains and moss clean up in 2 or more months. Will algae harm your siding. Green algae black mold and moss begin to die off on contact.

The black stains on the vinyl siding shown at left may be a fungus or a black agae. The fungus sets its sights on bright areas so that means it will aim for any pale surface that reflects light such as the siding on your house. The combination of the wind and the rain rinses and scrubs your surfaces clean over time. Clean siding without any scrubbing.

By the growth pattern we think this is almost certainly a dark colored algae. Yellow stainsmean you probably have damaged insulation or deteriorating sheathing behind the siding.