It is non toxic to trees and vegetation and will not remove natural color from the siding.
Mold on bottom of siding.
Bleach has long been the go to cleaner for mold because chlorine kills mold on contact.
For example cracks or tears in the butt joints are the perfect entryway for all types of fungi along with critters looking for a warm place to stay.
Dirt from rain splash up algae lichens mold moss or even smoke or chemical stains have different causes and different preventative measures.
Shadows moisture variations that collect or don t collect dust on siding even roof leaks or air leaks through building walls can often be diagnosed by a close look at wall stain patterns discussed here.
How to remove mold from vinyl siding using a pressure washer on vinyl.
The oxygen bleach comes as a granular powder that mixes with water.
In short to remove mold from you siding you should scrub the moldy area with your cleaning solution and let it soak for a few minutes before rinsing thoroughly.
Several factors might explain why that didn t happen.
There are a number of ways mold spores along with moisture can seep under your siding.
The safe and effective way to clean the wood is oxygen bleach.
Whatever the type of siding algae mold and mildew are most likely to form on the north side of a house because it stays shaded and damp.
Depending on the severity of the mold you may need to repeat the process until the area is free of mold.