I have the same exact issue at my own home although its siding is fiber cement.
Black mold vinyl siding.
Vinyl siding is a popular addition to the exterior of homes because it s known for being durable and affordable.
These stains are primarily caused by mold and mildew.
For a stronger solution mix together one third cup powdered laundry.
As rainwater and condensation accumulate on vinyl siding it can develop black spots of mold and mildew.
When mildew gains a foothold homeowners often turn to diluted chlorine bleach sodium hypochlorite a k a.
Standard household cleaners won t necessarily remove.
Here s a simple step by step guide on how you can get.
Mold and mildew on vinyl siding is a common problem that can be remedied with some effort and the right cleaning materials.
Mold removal usually requires some scrubbing and the best tool to use is a stiff bristle natural fiber scrub brush avoid metal fiber brushes they can damage the siding.
In order to keep your beautiful vinyl siding in tip top shape there is a bit of upkeep involved.
Luckily it s easy to prevent mold on vinyl siding with just a few simple preventative measures.
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.
But that doesn t mean you can t get mold on vinyl siding.
But there is a downside to this material and it s that mold and mildew tend to grow on vinyl siding.
Why does mildew grow on vinyl siding.
Your standard household whitener it appears to make mildew vanish but on porous surfaces such as wood or vinyl siding chlorine evaporates too quickly to get to the fungi s roots guaranteeing regrowth.
How to remove mold and mildew stains from vinyl siding.
Scrub with moderate pressure being careful not to push too hard against the flexible vinyl which can break using a scrub brush on the end of a long pole will help you avoid the need to climb to the top of the ladder to.
Accumulated dirt grime grease and plant material can also provide the perfect breeding ground for mold.
Removing mildew from vinyl siding.
70 water 30 white vinegar makes a great all purpose vinyl siding cleaner that removes light mold and mildew stains.
Over time mold can grow on a vinyl siding because it has not been cleaned for a while.