Black Spots On Wood Siding

The most common culprits are tannins mildew and mold.

Black spots on wood siding.

See debris staining and see proximate cause of roof shingle stains. Artillery fungus black tar spots on houses artillery fungus seeing black tar spots on the sides of your house or vehicles. For light black marks on flooring and siding just a simple sanding will remove the marks stains and lifetime wood treatment will cover the marks for more severe marks on boards and beams oxalic acid can be applied which reacts with iron stain and forms a colorless chemical complex. 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.

Black stains on vinyl or painted building exterior wall siding may also be mold as our photo shows at above right. Distinguishing the type of stain found on siding is useful in deciding on the cause and thus the cure or prevention of staining. Surface dirt should be removed from cedar shake siding before attempting to remove black spots from the mold. One method that is usually successful is to use a wood cleaning product.

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 from rain splash up algae lichens mold moss or even smoke or chemical stains have different causes and different preventative measures. Tannins ordinarily leach from cedar wood and do not normally cause any problems. Artillery fungus is a wood dwelling fungus commonly found in mulch.

This article discusses common causes of stains or discoloration found on vinyl building siding. Black brown or gray stains on roofing products due to debris left on the roof surface such as piles of leaves and organic waste from nearby trees. Black spots or stains on the other hand are not the natural progression. By sandy feather penn state extension.

Next we applied the wood restorer i use wolman s deck and fence brightener. The spots are about the size of the head of a pin and appear to be black or dark brown in color. Cleaning restoring wood siding then we used wolman s deck brite to clean it to get rid of the dark stains left by the mold. Cleaning can remove ugly black marks from your fence.

You can t get it all but you can really improve the overall look and reduce the dark areas considerably. It s hard to see shotgun fungus itself because it s only 2 millimeters wide. Vinyl siding stain diagnosis. Use the directions found on the product s container.