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Thread: Rotten stairs

  1. #1
    Join Date
    Dec 2012

    Default Rotten stairs

    My carpenter put up a covered porch...stairs going out on either's about 3ft off the ground with half rise stairs. Built over limestone gravel. The stairs and supports on the east side of the porch are all rotten and need to be replaced. They seem to have this white thick mold growing on them. Any ideas as to why this is happening? This is fairly a new build...maybe 3yrs old. It's all pressure treated lumber....I'm hoping this doesn't happen to the whole structure.

  2. #2
    Join Date
    Dec 2010
    Houston Texas

    Default Re: Rotten stairs

    There is mold that grows on steel.

    The best way to get rid of the mod is to control the water. If this is on the north side of your house this may be a routine chore. Perhaps you need to go up to .60 pressure treated suitable for marine environments.

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