Black Streaks On House Siding

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.

Black streaks on house siding.

The black stains on the vinyl siding shown at left may be a fungus or a black agae. You re outside taking care of some yard work and you suddenly notice streaking on your roof and siding. Artillery fungus is a wood dwelling fungus commonly found in mulch. See debris staining and see proximate cause of roof shingle stains.

Black stains on vinyl or painted building exterior wall siding may also be mold as our photo shows at above right. If black mold is suspected it should be inspected by a mold inspector who is certified. They are layers of micro organisms. By the growth pattern we think this is almost certainly a dark colored algae.

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. At first you won t see anything for a few years from the time your home or roof is new. 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. Use these simple landscaping tips to prevent this from happening.

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. 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. 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. 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.

You ve never really taken a good look before but yes it s there. A microscopy lab examination of a sample from this surface would be needed to know for sure. This algae growth usually begins as small spots and then eventually becomes visible streaks. But testing is probably not justified.

Blacks streaks on roof we will start with black streaks on roof. Black mold can create dark spots on the surface of siding but often mold growth is not limited to surface areas.