If not the green discoloration may be mold.
Cleaning green algae off siding.
If you re dealing with significant staining over large areas of wall consider having a professional clean the stucco.
Mix your cleaning solution.
Step 2 dip a long handled soft bristled scrub brush into the cleaning solution.
Part 2 of 3.
Fill a bucket with warm water and mix in the oxygen bleach powder according to the package directions.
Test a small area.
If this mixture doesn t remove all of the algae try a stronger solution using oxygen bleach.
Always test any type of cleaner on a small section of siding to be sure it doesn t stain streak or otherwise damage the siding.
A good cleaner to try first is a mixture of 70 water and 30 white vinegar.
Dip the scrub brush into the solution and test it to see if it is effective at removing the staining.
Create a mix of bleach and water 1 tsp.
Water stains remove with a mild detergent and water.
Maintenance is the first step to preventing the build up of moss algae and mold.
Borax can also be part of a permanent remedy for black mold treatment on vinyl siding or to clean mold from wood on your deck.
If you have green staining this is algae.
Borax solution for cleaning mold off vinyl siding another cleaning recipe that is highly effective at cleaning mold and mildew from vinyl siding is a borax solution applied with a soft brush.
You will need to use bleach to clean off micro organisms like algae and mildew.
Mildew and algae on vinyl and wood use a solution made of oxygen bleach not chlorine bleach mixed with water.
To prevent streaking start at the bottom and work up towards the top.
To 1 quart and use it in the same power washer as step 1.
Choose a cleaning solution that is appropriate for the type of growth you have on your siding.
Spray the siding with water from the garden hose to remove loose dirt and debris.