Black Spots On White Siding

By the growth pattern we think this is almost certainly a dark colored algae.

Black spots on white siding.

In nature the artillery fungus shoots its spores towards sunlight. In the absence of direct sunlight it shoots the spores at highly reflective surfaces such as white house siding. Removing spots from vinyl siding. Bet your boat will have spots too if you have one.

The first thing that you will need to do is take a look at the problem you are suffering from. Are those spots alive. Set the nozzle on a medium misting spray and then point the nozzle down when spraying the siding. 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 testing is probably not justified. Whether it s lighter white or tan or darker black spots you should take immediate action to clean these damaging fungi from your home. These spots are often caused by spiders especially true when you re near water. Mold and mildew can stain your siding cause wood to rot and impact allergies or make occupants sick.

Aluminum oxidation is a major problem but there are different degrees of oxidation that can need different treatments. The black stains on the vinyl siding shown at left may be a fungus or a black agae. 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.

Artillery fungus is a wood dwelling fungus commonly found in mulch. This will prevent water from seeping behind the siding and causing damage to the wood sheathing behind it. 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. 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. 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. Use these simple landscaping tips to prevent this from happening.