They may be a problem.
Black spots on vinyl siding.
In the absence of direct sunlight it shoots the spores at highly reflective surfaces such as white house siding.
Over time and through repeated changes in weather vinyl siding will attract and develop mold or.
How to clean spots on vinyl siding general cleaning tips.
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.
A microscopy lab examination of a sample from this surface would be needed to know for sure.
And of course the black spots show up better on white surfaces so they are noticed more easily.
Use these simple landscaping tips to prevent this from happening.
But testing is probably not justified.
The artillery fungus shoots its black sticky spore mass which can be windblown as high as the second story of a house.
John shows you images o.
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.
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.
By the growth pattern we think this is almost certainly a dark colored algae.
Are those spots alive.
It may look unsightly but it s not harmful.
Thankfully regular maintenance of your vinyl siding is fairly straightforward and simple.
These spots are often caused by spiders especially true when you re near water.
The fruiting body of this fungus orients itself toward bright surfaces such as light colored houses or parked automobiles.
Removing spots from vinyl siding.
If you re seeing dark specks on your siding the culprit could be hiding in your mulch.
Black spots on siding.
The black stains on the vinyl siding shown at left may be a fungus or a black agae.