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Rain Coming Through Render

Discussion in 'Building' started by Mark-UK, 13 Oct 2018.

  1. Mark-UK

    Mark-UK

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    I had my shed rendered last week and since them, we've had a fair bit of heavy rainfall. I checked a few days ago and there are wet patches on one of the newly rendered walls (see pics below)

    To be fair I haven't gotten around to applying masonry paint yet so is this normal, is this to be expected until I paint it? I hear the paint seals the walls so I'm hoping this is the issue. The other three walls are dry and that wall is more exposed to the elements.

    Please, can you put my mind at rest because the render wasn't cheap. If it helps, the renderer is a very experienced builder and has rendered in the past.

    1.JPG

    2.JPG
     
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  3. Notch7

    Notch7

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    Did he put SBR in the render?

    Maybe the render hasnt fully set yet.
     
  4. Mark-UK

    Mark-UK

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    I'm not sure what SBR is but I did see he was using some waterproof solution (said so on the bottle).
     
  5. opps

    opps

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    I don't understand why the walls seem to be wetter at the top. Do you have guttering on that side? Is the roof finished?
     
  6. Mark-UK

    Mark-UK

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    No guttering on the sides but it's a fibreglass roof with a raised lip around the sides - and a slope toward the rear where the guttering is.
     
  7. opps

    opps

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    Ok, thanks. So I assume that you have fascia boards and soffit boards in place.

    I am not a plasterer but I would not expect the rain to penetrate through the render. As Notch7 suggests, if they coated the bricks with SBR, the SBR should have provided a waterproof seal.

    SBR is kinda similar to PVA. The key difference is that unlike PVA is it not reactivated by moisture.
     
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  9. ^woody^

    ^woody^

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    It seems that the problem may be with the roof overhang and not the render per-se.
     
  10. Mark-UK

    Mark-UK

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    Interesting you should say that Woody because at the back of the shed, there's a tree and the wall there is dry. On the wall opposite the wall that's got problems, the wall isn't so exposed to the weather, and that too is dry.

    Perhaps all I need is some sort of lean-to or something.
     
  11. opps

    opps

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    Just wondering, how have you come to that conclusion?
     
  12. ^woody^

    ^woody^

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    The location and pattern
     
  13. opps

    opps

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    Thanks, for the clarification woody.
     
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