Black Spots On White Siding

Bet your boat will have spots too if you have one.

Black spots on white siding.

The black stains on the vinyl siding shown at left may be a fungus or a black agae. By the growth pattern we think this is almost certainly a dark colored algae. 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. This will prevent water from seeping behind the siding and causing damage to the wood sheathing behind it.

Aluminum oxidation is a major problem but there are different degrees of oxidation that can need different treatments. 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. Removing spots from vinyl siding. Set the nozzle on a medium misting spray and then point the nozzle down when spraying the siding.

Shotgun fungus can shoot black spots on your house here s how to avoid the mess if you re seeing dark specks on your siding the culprit could be hiding in your mulch. Aluminum doesn t rust however it can take on a slightly dull and white appearance. But testing is probably not justified. 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.

Whether it s lighter white or tan or darker black spots you should take immediate action to clean these damaging fungi from your home. Rinse the siding with a garden hose equipped with a nozzle. Mildew or even worse mold may be the culprit. Black spots on siding.

In nature the artillery fungus shoots its spores towards sunlight. The first thing that you will need to do is take a look at the problem you are suffering from. Are those spots alive. 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. Artillery fungus is a wood dwelling fungus commonly found in mulch. Mold and mildew can stain your siding cause wood to rot and impact allergies or make occupants sick.