Does anyone have a solution for removing black mildew stains from solid composite decking?

Posted on September 28, 2009 by admin

The decking is less than a year old. The decking looks like a black spotted leopard. The spots are over the entire deck. We have tried cleaners made for cleaning composite decking, power washer, other mildew removers, all with no success.

a bleach solution will probably do it, but it will dry out surface to some degree.

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6 Responses to Does anyone have a solution for removing black mildew stains from solid composite decking?

  1. wartytoadjody39 says:
    September 29, 2009 at 4:12 am

    a bleach solution will probably do it, but it will dry out surface to some degree.
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  2. Ted1948 says:
    September 29, 2009 at 4:54 am

    Not sure about black mildew but I use plain old white vinegar on green mildew. I keep some in a spray bottle out back.
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  3. Pastels says:
    September 29, 2009 at 5:29 am

    try a 1:1 solution of bleach and water
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  4. kristen9_23 says:
    September 29, 2009 at 5:37 am

    maybe a pressure washer w/ a higher PSI

    or maybe bleach
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  5. Dolby21 says:
    September 29, 2009 at 6:21 am

    I have the same problem. Use a mixture of Bleach and water. This will remove most of the stains, but they will come back.
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  6. whirlwind says:
    September 29, 2009 at 7:01 am

    bleach and water mixed.
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