Black Streaks On House Siding

Black stains on vinyl or painted building exterior wall siding may also be mold as our photo shows at above right.

Black streaks on house siding.

But testing is probably not justified. By the growth pattern we think this is almost certainly a dark colored algae. They are layers of micro organisms. Contractors drop in the dirt laying on the ground it gets filthy on the backside.

Stains and streaks can show up easily on roofing and siding over time thanks to a whole host of nuisances including mold mildew and plain ol dirt. Danny one explanation for this is that a lot of times siding is pretty dirty when it gets on the house. If black mold is suspected it should be inspected by a mold inspector who is certified. Another common thing that we found that causes dirt to come out is mud wasps or dirt daubers as we call them in the south.

See debris staining and see proximate cause of roof shingle stains. The black stains on the vinyl siding shown at left may be a fungus or a black agae. If you notice lots of tiny black or dark brown spots developing on your siding above a landscaped area of your yard as seen below it is most likely artillery otherwise known as shotgun fungus. Black brown or gray stains on roofing products due to debris left on the roof surface such as piles of leaves and organic waste from nearby trees.

Although these dark spots and ugly black streaks on your roof may look like dirt mildew soot or mold what they really are is algae. This algae growth usually begins as small spots and then eventually becomes visible streaks. Artillery fungus is a wood dwelling fungus commonly found in mulch. You ve never really taken a good look before but yes it s there.

The most common type is known as gloeocapsa magma also known as blue green algae. Black mold can create dark spots on the surface of siding but often mold growth is not limited to surface areas. A microscopy lab examination of a sample from this surface would be needed to know for sure. Shotgun fungus can shoot black spots on your house here s how to avoid the mess if you re seeing dark specks on your siding the culprit could be hiding in your mulch.

You re outside taking care of some yard work and you suddenly notice streaking on your roof and siding. If he is unable to detect mold inside your exterior wall but confirms that the dark spot is black mold the mold should be removed at once.