If you re wondering how to clean mildew off of rv awnings without harsh chemicals your best bet is going to be vinegar and baking soda.
Cleaning mould off fabric awning.
Spray the underside of your awning with a soap and water mixture and then roll it up let it sit for an hour.
Use your garden hose to wet your awnings completely before you start spraying the mildew remover.
Mix one part hydrogen peroxide with six parts of water in a bucket.
Use a mildew remover instead the same one that you use in your bathroom.
Scrub the awning with a stiff brush saturated with the soap solution.
Use a circular motion to work the solution into the awning fabric.
Avoid scrubbing which can remove the water repelling finish and ruin your awning.
Use a stiff brush dish soap and water.
If you need more cleaning solution simply double or triple all the quantities.
You spend about 5 minutes working on it and it comes out like a brand new dust free awni ng.
Roll the awning back out rinse it off and let it dry.
You can also use a vinyl or fabric cleaner if you wish.
For fixed awnings rollup awnings and retractable awnings made of canvas or outdoor fabrics use a mild laundry detergent and lukewarm water.
Limit the size of your work area so the soap does not dry on the awning.
Fill a spray bottle with white vinegar.
To remove mildew from a canvas awning you ll need a cleaning solution made with 1 cup 237 ml bleach cup 59 ml of mild liquid soap and 1 gallon 3 8 l of cool water.
The combination of the wind and the rain rinses and scrubs your surfaces clean over time.
If your awnings become stained with mildew use a mildew remover rather than bleach.
To clean metal awnings use a metal cleaning solvent and water.
Acrylic awnings also come with a water repelling finish.
Mix your cleaning solution.
Step 3 spray the rest of the awning with the solution and let it sit for 30 minutes.
Spray the vinegar directly onto the mold areas so those areas are saturated with vinegar.
Pour some of the mixture into a spray bottle.
Soak the area with a generous amount of vinegar then use a stiff brush for acrylic or a soft brush for vinyl to scrub the mildew out.
Green stains clean up in 1 2 weeks black stains and moss clean up in 2 or more months.
Alternatively use a shop vacuum to clear away all dust dirt and debris.
While bleach will kill the mildew it will also cause discoloration to your awning s fabric.
Green algae black mold and moss begin to die off on contact.
Use a medium or hard bristled brush to sweep away all dust dirt and debris.