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What is this black staining on stone door canopy? How do I remove it??

Discussion in 'General DIY' started by Lisa111222333, 23 Jul 2020.

  1. Lisa111222333

    Lisa111222333

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    Can anyone recommend any products they have used to successfully get rid of black staining on stone?

    I think it's black mold and Google results tell me to use bleach and a scrubbing brush but I'm hesitant on using any bleach.

    Any tips would be greatly appreciated!



    canopy.jpg
     
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  3. JohnD

    JohnD

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    "wet and forget"

    but the problem seems to be that the little roof is damp because it does not have a suitable top layer. Maybe asphalt or lead. These days synthetic rubber membranes are used on flat roofs. Does water drip on it from a faulty gutter above? or from that hopper?
     
  4. Lisa111222333

    Lisa111222333

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    Thanks John, I'll look into that product.

    You know what, I've never even looked at the top surface yet! Not long bought the house, but I will take a look. I doubt there will be any membrane of sorts though.

    Yes, the guttering above is completely shot and rainwater drips over the edge all the way along the gutter. Do you think that that's the culprit?
     
  5. JohnD

    JohnD

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    might be blocked

    yes.
     
  6. Lisa111222333

    Lisa111222333

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  7. JohnD

    JohnD

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    don't know, I'm not keen

    Fixing the leak or overflow would be a better solution.
     
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