Black Substance On House Siding

White and other light colors will reflect rather than absorb the sun s rays.

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. A white or light colored house will reflect more rays keeping indoor temperatures cooler in hot summer months. It s on the porch my windows but it is worse on the siding. It goes all the way up to my second story windows and is even under my soffit and on my gutters.

Distinguishing the type of stain found on siding is useful in deciding on the cause and thus the cure or prevention of staining. Dirt from rain splash up algae lichens mold moss or even smoke or chemical stains have different causes and different preventative measures. We have these small black spots that look like specks of tar all over our white vinyl siding of our house. Black houses will absorb more heat from the sun than white houses.

Vinyl siding stain diagnosis. A chalky white substance on your vinyl siding and trim is caused by oxidation which occurs most often during damp or wet weather. This article discusses common causes of stains or discoloration found on vinyl building siding.