If you are worried about damaging the vinyl you may use a lower pressure pump sprayer.
Remove green from siding.
When mildew gains a foothold homeowners often turn to diluted chlorine bleach sodium hypochlorite a k a.
Scrub siding with a stiff brush moving from side to side over green stains.
Pour the cleaning solution into a power washer.
Begin working at the top of the house and work your way down.
Scrub from side to side applying extra force over the green stains.
It appears to make mildew vanish but on porous surfaces such as wood or vinyl siding chlorine evaporates too quickly to get to the fungi s roots guaranteeing regrowth.
For a stronger solution mix together one third cup powdered laundry.
Standard household cleaners won t necessarily remove mildew from siding but a solution of bleach or vinegar should do the job.
Your standard household whitener.
Remember not to angle the sprayer upward to keep the solution from seeping under the siding layers.
Unlike mold this type of growth is mainly cosmetic and can be removed using minimal force and a few basic materials.
Begin at the top of your house and work down.
How to remove algae from siding 1.
Rv brushes work well for cleaning siding.
Scrub the siding with a long handled stiff scrub brush dipped into either the tsp or bleach solution.
70 water 30 white vinegar makes a great all purpose vinyl siding cleaner that removes light mold and mildew stains.
Begin by spraying a 5 foot wide section of the siding from the ground to the top.
Stubborn mold may require a mixture of water and chlorine bleach.
The algae may appear brown or green in color and remain damp diminishing the appearance of your home and spreading out over time.