Mildew and algae on vinyl and wood use a solution made of oxygen bleach not chlorine bleach mixed with water.
How to remove algae from cedar siding.
It is non toxic to trees and vegetation and will not remove natural color from the siding.
Oxygen bleach removes algae mold and mildew from cedar restoring much of the wood s natural beauty.
Drench the siding where algae mold and or mildew is present and let solution sit for 20 minutes or so and rinse off.
Spray down the siding with plain water from the garden hose.
But the painter wanted to also paint the siding or spray it i wasn t sure about that but i find nothing that i need to do to the roof except worry that the algae might do harm over time.
Removing the the wood mold with oxygen bleach.
Avoid spraying the water from the ground up as large amounts of water may seep behind the siding causing damage.
The safe and effective way to clean the wood is oxygen bleach.
Set the nozzle on medium force and begin at the top spraying the water down.
The oxygen bleach comes as a granular powder that mixes with water.
Have not experience any damage from solution on bushes but.
And i called up the cedar association and they say you could do more harm than good and so i got mixed feelings.
Water stains remove with a mild detergent and water.
It s also safe for plants that may inadvertently get dripped upon during the cleaning process.
Stains on wood cleanse with mild detergent mixed with water.
The roof is solid and doing well.
Do not power wash.