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Cavity trays

Discussion in 'Building' started by Simba_ali, 7 Jun 2020.

  1. Simba_ali

    Simba_ali

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    Hey,

    I was wondering if there should be plastic drainage holes above this flat roof upstand?

    The wall is supported by 2 metal ibeams with no supporting wall underneath. I'm had a leak onto the ceiling below of about 2-3 pints of water so trying to figure out if this is a possible cause.
     

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  3. John D v2.0

    John D v2.0

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    If it's a cavity wall there should be a tray and weep holes, the tray is the important bit for small amounts otherwise any water that finds its way into the cavity will come through into the room, but the weep holes are needed to drain any significant amount of water
     
  4. Simba_ali

    Simba_ali

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    Thanks for the reply ,

    I can not believe that they haven't put weep holes in this area. I was hoping that maybe where roof upstand enters the brick it acts like a weep hole but obviously not :(

    So would you say judging by my pic there are no cavity trays above the rubber upstand?
     
  5. ^woody^

    ^woody^

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    If the damp is directly below the centre of the wall, suspect no tray. If it's below the line of the outer wall edge and towards the underside of the roof, suspect the flashing or upstand.

    The tray is the important thing, not the lack of weep holes
     
  6. Simba_ali

    Simba_ali

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    Above where the leak is there is a balcony door which was my first suspect as alot of areas of the leak are the void space where the door is so there is no wall directly above but it could move along the metal support joist I guess..

    Also this is more than damp, I had water dripping from the light socket and it's made a small hole In the ceiling.
     
  7. ^woody^

    ^woody^

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    You need to check the door cill and the seal beneath it
     
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