What Causes White Spots On Vinyl Siding

This can potentially create a dull and chalky appearance.

What causes white spots on vinyl 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. They just won t let go. 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.

I am trying to find them now lo. My grille cover was held on by two plastic nuts white cheap but they matched the filter cover. Black spots on siding. Over time and through repeated changes in weather vinyl siding will attract and develop mold or mildew spots especially in north facing and other shaded areas.

The spores dotting your house may not fit in with your redecorating plans but they won t cause any structural damage or grow there. Distinguishing the type of stain found on siding is useful in deciding on the cause and thus the cure or prevention of staining. It goes all the way up to my second story windows and is even under my soffit and on my gutters. Vinyl siding stain diagnosis.

A major cause of vinyl discoloration is the oxidation of the chemicals in the vinyl over time due to exposure to sunlight and acid rain. This article discusses common causes of stains or discoloration found on vinyl building siding.