Black Spots On Vinyl Siding

A side of my house in new york is covered in the dots.

Black spots on vinyl siding.

Dirt and insect secretion stains however can adhere to vinyl siding attracting molds mildews and algae. Some tell us it s from spiders. Others have said it s a fungus from mulch. It goes all the way up to my second story windows and is even under my soffit and on my gutters.

Vinyl siding is very popular due to its durability and simple maintenance. Removing spots from vinyl siding. Store bought cleaners such as windex will usually do the job for these kinds of spots but if you want to make your own chemical free solution you can use a natural mixture of. Algae may also look black or brown as may some molds.

We have these small black spots that look like specks of tar all over our white vinyl siding of our house. 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. 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. The vinyl siding institute yes there really is such an organization offers some helpful and specific tips for dealing with stubborn moldy spots on your siding.

I have been experimenting with various solutions on my vinyl siding to remove the spots. Also known as artillery or cannonball fungus sphaerobolus it uses internal water pressure to forcefully fire its spores similar to seeds up to 20 feet away the fungus sets its sights on bright areas so that means it will aim for any pale surface that reflects light such as the siding on your house. It s on the porch my windows but it is worse on the siding. I ve found the following over the counter product works with elbow grease to remove the spots.

The photo at above left shows green algae on vinyl siding. 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. A first use a scraper or wire brush and scrape over a section of affected vinyl siding.