The oxygen bleach comes as a granular powder that mixes with water.
Cleaning cedar siding with bleach.
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.
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.
Dry the siding first if you notice signs of mold growth.
Spray a generous amount of the bleach mixture onto the siding.
Water any grass.
Put on a pair of heavy duty rubber gloves because you are about to deal with bleach which can prove highly irritable.
Removing the the wood mold with oxygen bleach the safe and effective way to clean the wood is oxygen bleach.
Both chlorine and oxygen bleach have great anti microbial qualities that allows them to clean and disinfect the surfaces they are applied to.
Leave the solution on the siding for about five minutes.
It is non toxic to trees and vegetation and will not remove natural color from the siding.
Mildew and tannin stains are often the causes of dark spots on cedar shakes.
I used double the concentration on mine because i got tired of scrubbing.
You can dry wood siding using a dehumidifier or a space.
One method used to determine if spots are from these two conditions is to treat them with a solution of bleach 1 part diluted with water 9 parts.