Unfortunately even in small amounts chlorine bleach eats away at the material it is applied to and in the case of your cedar siding it can weaken your wood s fibers.
Cleaning cedar siding with bleach.
It is non toxic to trees and vegetation and will not remove natural color from the siding.
Dry the siding first if you notice signs of mold growth.
Water any grass.
Spray a generous amount of the bleach mixture onto the siding.
I used double the concentration on mine because i got tired of scrubbing.
Both chlorine and oxygen bleach have great anti microbial qualities that allows them to clean and disinfect the surfaces they are applied to.
This is not the case for oxygen bleach.
Leave the solution on the siding for about five minutes.
Mildew and tannin stains are often the causes of dark spots on cedar shakes.
How to clean cedar siding with bleach 1.
Removing the the wood mold with oxygen bleach the safe and effective way to clean the wood is oxygen bleach.
Put on a pair of heavy duty rubber gloves because you are about to deal with bleach which can prove highly irritable.
You can dry wood siding using a dehumidifier or a space.
The side of the house with the least sun exposure can be the worst spot with the cedar developing mildew or mold that looks black.