Black Algae On Siding

Will algae harm your siding.

Black algae on siding. But testing is probably not justified. Black stainsare usually a sign of mildew algae mold or fungus. A microscopy lab examination of a sample from this surface would be needed to know for sure. You re most likely to see green stains on siding that is inadequately ventilated.

Black algae can grow there as well as in areas with direct sunlight due to its protective coating. Clean siding without any scrubbing. The combination of the wind and the rain rinses and scrubs your surfaces clean over time. 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.

Usually appearing as a scaly growth it can grow on any type of siding. Green algae black mold and moss begin to die off on contact. Lichen is a complex organism formed by a combination of fungus and algae. The black stains on the vinyl siding shown at left may be a fungus or a black agae.

Green stains clean up in 1 2 weeks black stains and moss clean up in 2 or more months. Wet and forget is as simple as spraying your outdoor surface and leaving it. Yellow stainsmean you probably have damaged insulation or deteriorating sheathing behind the siding. Fortunately algae on vinyl siding will not affect the function of your siding or cause it decompose.

Green stainsare almost always the result of algae or moss. However if the algae is left to flourish it could permanently stain lighter colored siding with unsightly green brown or black spots.