Black Stains On Vinyl Siding

Bleach works but if the house is in a generally damp area and the siding is facing north the mold fungus will just come back.

Black stains 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. Remove insect stains from vinyl siding with simple cleaners. Before attempting to remove stains it is best to clean the area with a general cleaner. Clean tough stains off with a nonabrasive cleaner or a homemade vinyl siding cleaner of soap and water that won t damage the surface of the vinyl.

By the growth pattern we think this is almost certainly a dark colored algae. Never use chlorine bleach to remove insect stains as it will seep into the ground and kill the roots of any vegetation in the area. Thankfully regular maintenance of your vinyl siding is fairly straightforward and simple. A microscopy lab examination of a sample from this surface would be needed to know for sure.

Begin by spraying a 5 foot wide section of the siding from the ground to the top. But testing is probably not justified. The black stains on the vinyl siding shown at left may be a fungus or a black agae. Protect yourself with rubber gloves and goggles.

How to clean spots on vinyl siding general cleaning tips. If you are worried about damaging the vinyl you may use a lower pressure pump sprayer. Dish washing soap can be used instead of laundry detergent. Remember not to angle the sprayer upward to keep the solution from seeping under the siding layers.

Mix a strong solution of siding cleaner or other strong detergent and hot water. 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. Over time and through repeated changes in weather vinyl siding will attract and develop mold or. Pour the cleaning solution into a power washer.