Black Substance On House Siding

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 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.

Black substance on house siding.

It s on the porch my windows but it is worse on the siding. Dirt from rain splash up algae lichens mold moss or even smoke or chemical stains have different causes and different preventative measures. It goes all the way up to my second story windows and is even under my soffit and on my gutters. The side of the house with the least sun exposure can be the worst spot.

White and other light colors will reflect rather than absorb the sun s rays. This article discusses common causes of stains or discoloration found on vinyl building siding. A white or light colored house will reflect more rays keeping indoor temperatures cooler in hot summer months. Black houses will absorb more heat from the sun than white houses.

Distinguishing the type of stain found on siding is useful in deciding on the cause and thus the cure or prevention of staining. A chalky white substance on your vinyl siding and trim is caused by oxidation which occurs most often during damp or wet weather. Oxidation can be cleaned from most vinyl siding but the process.