Why Does Vinyl Siding Mildew

Stains on vinyl siding.

Why does vinyl siding mildew. Maintain your ventilation ducts. You re probably wondering how mildew and algae can survive on plastic or vinyl siding. One of the main reasons someone might see mildew or mold on vinyl siding is that dirt has accumulated on the surface. Even though vinyl is extremely hardy and durable as an exterior siding for your home mildew will form on it in areas that are in the shade or where the vinyl is exposed to moisture on an ongoing basis.

Clogged gutters can lead to mildew growth because they will leak rainwater on specific areas of your siding. Not only does that make the siding look unclean but it can also lead to mildew because fungus often feeds on dirt and dust. Because it is an exterior product vinyl siding can accumulate a host of dirt grime and stains on account of things like pollen bird and insect droppings spider webs and rust. When mildew gains a foothold homeowners often turn to diluted chlorine bleach sodium hypochlorite a k a.

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. This may or may not mean you have excess moisture leading to mildew. Rust colored stainsare usually a sign that nails in the siding are rusting.

The mildew and algae are feeding on sugars dust dirt or other things that are attached to the siding. Stains the same color as your sidingare typically caused by water streaming down siding due to damaged or misaligned gutters. These leaks can get behind your siding and eventually cause mildew or mold. Standard household cleaners won t necessarily remove mildew from siding but a solution of.