Algae may also look black or brown as may some molds.
Black spots vinyl siding.
The photo at above left shows green algae 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.
You have the infamous artillery fungus.
It goes all the way up to my second story windows and is even under my soffit and on my gutters.
Click to enlarge any image small gray or darker round spots on siding that are about 1 16 in individual diameter particularly if the spots are slightly raised may be artillery fungus a mold spore.
It s on the porch my windows but it is worse on the siding.
Some tell us it s from spiders.
Thankfully i only have one area that has plants next to it so the bleach solution wouldn t hurt them but not sure about my deck stains.
We have these small black spots that look like specks of tar all over our white vinyl siding of our house.
Shotgun fungus can shoot black spots on your house here s how to avoid the mess.
What are these black spots on your house siding.
Vinyl siding is very popular due to its durability and simple maintenance.
Others have said it s a fungus from mulch.
Don t be tempted to sand or use harsh cleaner because these will likely damage your siding.
We have these small black spots that look like specks of tar all over our white vinyl siding of our house.
Dirt and insect secretion stains however can adhere to vinyl siding attracting molds mildews and algae.
Artillery fungus is a wood dwelling fungus commonly found in mulch.
Insect stains and other debris can be removed by simply cleaning vinyl siding with household cleaners.
If you have new vinyl siding that s still shiny and you know that the spores haven t been stuck on for more than a few days you might be able to power wash them off.
It goes all the way up to my second story windows and is even under my soffit and on my gutters.
Small black spots on siding.
We have thousands of tiny black spots pin head size all over the siding of our house.
The artillery fungus is a white rotting wood decay fungus that likes to live on moist landscape mulch.
Davis of penn state.
