Small Black Spots On Vinyl Siding

It s on the porch my windows but it is worse on the siding.

Small black spots on vinyl siding.

We have these small black spots that look like specks of tar all over our white vinyl siding of our house. But testing is probably not justified. A microscopy lab examination of a sample from this surface would be needed to know for sure. Micro black spots on siding tags.

Some tell us it s from spiders. It goes all the way up to my second story windows and is even under my soffit and on my gutters. By the growth pattern we think this is almost certainly a dark colored algae. 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.

The black stains on the vinyl siding shown at left may be a fungus or a black agae. Although it s most often found on the east coast it can grow anywhere and especially thrives in areas that have cool damp springs or rainy fall weather conditions. The black tar like spots that are all over your vinyl siding are more than likely a fungus called sphaerobolus stellatus better known as artillery or shotgun fungus. Use these simple landscaping tips to prevent this from happening.

Artillery fungus is a wood dwelling fungus commonly found in mulch.