Usually appearing as a scaly growth it can grow on any type of siding.
Black algae on siding.
But testing is probably not justified.
Fortunately algae on vinyl siding will not affect the function of your siding or cause it decompose.
The combination of the wind and the rain rinses and scrubs your surfaces clean over time.
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.
By the growth pattern we think this is almost certainly a dark colored algae.
Will algae harm your siding.
Clean siding without any scrubbing.
Green stainsare almost always the result of algae or moss.
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.
Yellow stainsmean you probably have damaged insulation or deteriorating sheathing behind the siding.
You re most likely to see green stains on siding that is inadequately ventilated.
A microscopy lab examination of a sample from this surface would be needed to know for sure.
Lichen is a complex organism formed by a combination of fungus and algae.
However if the algae is left to flourish it could permanently stain lighter colored siding with unsightly green brown or black spots.
Black algae can grow there as well as in areas with direct sunlight due to its protective coating.
Green algae black mold and moss begin to die off on contact.
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.