Spray down the siding with plain water from the garden hose.
Bleach on aluminum siding.
Clean the aluminum siding with a sponge dipped in the water bleach solution.
Scrub as hard as possible without buckling the aluminum.
Spray this mixture on remaining spots.
Remove mold from aluminum siding with borax banish light mildew mold and chalky build up from aluminum siding by cleaning with trisodium phosphate or borax.
It s not uncommon to have a mildew problem on aluminum siding depending on where you live.
Add 3 4 cup of household bleach or vinegar to each gallon of water if needed.
With the ryobi chemical sprayer you just pop in a battery and turn it on.
Use a high pressure nozzle on the garden hose to remove loose dirt and debris.
Add bleach or vinegar if your siding shows any signs of mildew.
Make sure the aluminum siding is still wet from the rinsing step.
Use the sprayer wand to evenly disperse the tsp mixture all over that section of siding.
However bleach can change the color of the metal.
Bleach will not cause immediate corrosion or bubbling on aluminum foil or an aluminum surface.
Trisodium phosphate is powerful so be cautious.
Let the cleanser sit for a couple minutes before scrubbing.
If mold or mildew is the culprit spraying with a bleach solution will remove it.
The bleach is not strong enough to eat away at the metal.
Don t mix bleach with any cleaner that has ammonia in it.
Step 4 fill a clean empty garden sprayer with a chlorine bleach and water mixture.
It can be applied with a pressure washer with water supplied from a tap and then rinsed off after five to 10 minutes.
Like using homemade deck cleaner with borax there are eco friendly alternatives for cleaning without bleach or store bought chemicals.
After some time the aluminum surface may darken or even turn black.
If cleaning siding manually dilute 1 5 cups of the concentrate in 13 5 cups.