For tough spots like paint drips tar and pencil and pen marks use a nonabrasive bathtub cleaner or nylon scrub pad.
Black stains on vinyl siding.
But testing is probably not justified.
The black stains on the vinyl siding shown at left may be a fungus or a black agae.
Before attempting to remove stains it is best to clean the area with a general cleaner.
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.
You basically have to stay on top of it remove any tree branches that are up against it make sure your waterspouts or gutters aren t keeping it wet a lot and ask at the hardware if there is anything you can apply to slow down growth.
Thankfully regular maintenance of your vinyl siding is fairly straightforward and simple.
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.
Pour the cleaning solution into a power washer.
Dish washing soap can be used instead of laundry detergent.
Mix a strong solution of siding cleaner or other strong detergent and hot water.
Begin by spraying a 5 foot wide section of the siding from the ground to the top.
How to clean spots on vinyl siding general cleaning tips.
Scrub the area with a scrub brush and the solution.
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.
Protect yourself with rubber gloves and goggles.
By the growth pattern we think this is almost certainly a dark colored algae.
Over time and through repeated changes in weather vinyl siding will attract and develop mold or.
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.
If you are worried about damaging the vinyl you may use a lower pressure pump sprayer.
Remove insect stains from vinyl siding with simple cleaners.