As an experiment rub a clean white cloth across the unwashed siding.
Clean aluminum siding tsp.
Manual cleaning is preferred.
Once you ve determined what cleaning method to use try to work in the shade as much as possible.
Spray this mixture on remaining spots.
Tsp is a powerful cleaner that i use for all sorts of tough jobs from scrubbing our tile floors and kitchen cabinets before painting to washing aluminum siding.
To clean stubborn mildew you will need bleach.
To clean aluminum siding having mildew use a solution of one part bleach and four parts water.
For mildew killing household bleach is added to the tsp water mixture.
If mold or mildew is the culprit spraying with a bleach solution will remove it.
1 2 cup tsp to 2 gal.
It uses peroxide to brighten and renew surfaces without bleach while removing dirt and stains from mold mildew moss algae chalking and more.
Mix 2 ounces of tsp into a gallon of warm water in a chemical sprayer.
Check your siding first for signs of mildew chalking and needed repairs.
The cloth will likely come up dark gray with a layer of fine soot.
Warm water for heavy duty cleaning to 1 cup tsp to 3 quarts warm water for ridiculously heavy duty cleaning source the savogran company.
It wasn t so long ago that trisodium phosphate tsp was a go to choice for tough cleaning jobs especially on exteriors.
Vinegar and borax are other good eco friendly alternatives for cleaning mold and mildew.
But there are some.
Diluted in water and applied often with a stiff scrub brush it can remove.
It s not uncommon to have a mildew problem on aluminum siding depending on where you live.
And in some cases it isn t.
You can also look for special cleaning solutions that are meant for cleaning aluminum siding at your local hardware store.
Cleaning aluminum siding can be a quick and easy task and simple green oxy solve house and siding cleaner can help make it even easier.
It doesn t have any odor and doesn t suds up like other cleaners.