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The back side of my garage is shadowed by branches from neighbors trees, which causes mold/mildew to grow on the vinyl siding. Since removing the trees/branches is out of the question, is there some type of product that can be applied to the siding to prevent this growth?

Currently I power wash the siding once a year, but the chore has lost it's fun factor so I'd like to avoid doing it. Even if the product/procedure could reduce my maintenance to every other year or every few years, that would be a significant gain in my book.

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Is trimming the trees an option? –  Niall C. May 21 '12 at 16:56
    
@NiallC. No. The major culprit is a large pine tree near the neighbors property line. The tree casts a shadow on the garage almost the entire day. –  Tester101 May 21 '12 at 16:58

2 Answers 2

Bottom paint for boats might work, but there's not a large selection of colors. Bleach or Tilex will kill the mold, but won't prevent new growth.

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Rustoleum sells a mold/mildew-proof paint called Perma-White.

They also sell a fungicide (Tiabendazole) additive called ADD-2 you can mix into your preferred paint.

Either of those should at least help some.

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