Q:

How do you clean Alcoa vinyl siding?

A:

Quick Answer

While the manufacturer advises that average rainfall is sufficient to keep Alcoa vinyl siding clean, areas under awnings or balconies may need additional attention if the overhang blocks the rain. To deal with everyday dirt from the air, clean the vinyl with water from a moderate pressure hose, and use a soft brush for more stubborn spots.

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Full Answer

If the accumulation of dirt is too heavy for removal with only water, apply a solution containing 1 gallon of water, 1/3 cup of detergent and 2/3 cup of trisodium phosphate. Apply the solution to the siding with the brush, and rinse with a water hose. When cleaning off hardier materials, such as caulk or tar, use mineral spirits directly on the stain, rinsing it off completely after it's clean. Tweak the cleaning formula slightly to remove mildew stains, using 3 gallons of water instead of 1 gallon and 1 quart of a 5 percent sodium hypochlorite solution, such as Clorox. Again, apply the solution using a soft bristled brush, as more abrasive products risk damaging the siding. Do not use a power wash on the siding, as that can damage it, cause streaks or leak between the insulation and the siding, which risks further damage.

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