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Redwood deck unleashes black soot attack

Tannin, mildew likely culprits in staining of skin, clothes
Published on Apr 7, 2004

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by CareyBot

Q: My redwood deck, which has never had any type of waterproofing or other protective coating put on it, always turns black after I power wash it. Whatever this black stuff is, it comes off on shoes, socks, skin, material–I ...

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