Black Substance On House Siding

They are the reproductive structures produced by artillery fungus sphaerobolus stellatus one of several fungi common on wood mulches used around plantings in home and commercial landscapes.

Black substance on house siding.

In nature the artillery fungus shoots its spores towards sunlight. Whether it s mold or mildew your siding is no place to have things growing. If you re seeing dark specks on your siding the culprit could be hiding in your mulch. By the growth pattern we think this is almost certainly a dark colored algae.

Watch as lou manfredini ace s home expert shows you an easy and affordable way. The black stains on the vinyl siding shown at left may be a fungus or a black agae. Are those spots alive. 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.

Shotgun fungus can shoot black spots on your house here s how to avoid the mess. 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. And of course the black spots show up better on white surfaces so they are noticed more easily. The dark spots are indeed spores but they do not come from your oak trees.

But testing is probably not justified.