Others have said it s a fungus from mulch.
Black spots 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.
We have thousands of tiny black spots pin head size all over the siding of our house.
If you notice lots of tiny black or dark brown spots developing on your siding above a landscaped area of your yard as seen below it is most likely artillery otherwise known as shotgun fungus.
Dirt and insect secretion stains however can adhere to vinyl siding attracting molds mildews and algae.
It goes all the way up to my second story windows and is even under my soffit and on my gutters.
We have these small black spots that look like specks of tar all over our white vinyl siding of our house.
Don t be tempted to sand or use harsh cleaner because these will likely damage your siding.
Vinyl siding is very popular due to its durability and simple maintenance.
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.
Insect stains and other debris can be removed by simply cleaning vinyl siding with household cleaners.
Algae may also look black or brown as may some molds.
The artillery fungus is a white rotting wood decay fungus that likes to live on moist landscape mulch.
Artillery fungus is a wood dwelling fungus commonly found in mulch.
Davis of penn state.
Some tell us it s from spiders.
You have the infamous artillery fungus.
The siding has been on the houses for 12 years and now everyone is talking about the black spots so it s really a town issue lol but one we need to figure out.
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.
The photo at above left shows green algae on vinyl siding.
It s on the porch my windows but it is worse on the siding.
We have these small black spots that look like specks of tar all over our white vinyl siding of our house.
Small black spots on siding.
It goes all the way up to my second story windows and is even under my soffit and on my gutters.
It s on the porch my windows but it is worse on the siding.
