Damp on wall

Hi I have a 1970s build terraced house with cavity walls and solid concrete floor. The problem is that on the partywall adjoining onto neighbours there is damp on the wall the wallpaper has become wet and fallen off the paint underneath is all crumbly. I have talked to the neighbours and they say they have nothing on there side.

Has anybody else been in this situation? 

Could this be rising damp?
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Comments

  • ThisIsWeird
    ThisIsWeird Posts: 4,458
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    Photo, please. Depending on how concentrated the patch is, it could be a 'leak'.
  • Do you have a chimney breast there?
    2006 LBM £28,000+ in debt.
    2021 mortgage and debt free, working part time and living the dream
  • pope
    pope Posts: 197
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    Do you have a chimney breast there?
    No chimney chimney breast.
  • pope
    pope Posts: 197
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    Photo, please. Depending on how concentrated the patch is, it could be a 'leak'.
    I don't have photo. A friend of mine has a damp meter with 4 metal pins on it I have put that on the wall and it says 35% 38% and 42% moisture.
  • stuart45
    stuart45 Posts: 3,822
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    Do you know if the party wall is a cavity wall, or 9 inch solid?
  • Grizebeck
    Grizebeck Posts: 2,653
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    Don't understand why no photo
    Advocate in the County Court dealing with a variety of cases, attending the courts in the North East and North Yorkshire
  • pope
    pope Posts: 197
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    Grizebeck said:
    Don't understand why no photo
    I don't have a phone with a camera. 
  • pope
    pope Posts: 197
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    FreeBear said:
    pope said:
    Photo, please. Depending on how concentrated the patch is, it could be a 'leak'.
      A friend of mine has a damp meter with 4 metal pins on it I have put that on the wall and it says 35% 38% and 42% moisture.
    Go and stick it in to his backside - You will get similar readings.
    Those damp meters will only give a true reading when used on untreated timber. Sticking them in to a wall or any other material, all you are reading is a conductivity. Salts, paints, and even the type of material will give false readings that can not be relied upon.
    That the plaster/paint is crumbling and the paper peeling off does indeed point to a damp wall. You need to pinpoint the source, which will be a leaking pipe (either CH, water, or downpipe), or water is getting in to the cavity and tracking down/across. Photos of the interior and exterior will help to point you in the right direction.
    There is no down pipe attached to the wall also there is no radiator on the wall.
  • subjecttocontract
    subjecttocontract Posts: 1,735
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    edited 5 November 2023 at 8:17PM
    Could it be.....
    * cold water storage tank/pipes in loft ? Check loft.
    * roof tile damaged or slipped ? Borrow some binoculars.
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