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Cold spots.

Discussion in 'Damp And Damp Proofing Discussions' started by mikejchapman, Jan 27, 2018.

  1. mikejchapman

    mikejchapman New Member

    I converted our dining room a good few years ago now and have always had cold spots all over the external wall where each dab is. The 2nd pic shows a spot in a corner which although dry has black marks over a small area of a couple of inches.
    I put up the plaster boards and the wall was the inner skin of blocks, its a cavity wall with brick on the external.
    We have issues with soft furnishings going mildewed and the room is generally cold. We have rads both ends.

    Any advice would be welcomed please, as we'd really like to finally sort it out. [​IMG][​IMG]

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  2. Danny

    Danny TPF OWNER

  3. flynnyman

    flynnyman Private Member

    Any pics of the wall outside behind it?
     
  4. Tinytom

    Tinytom Active Member

    I’d guess a combination of water ingress and no trickle vents in the windows? Stagnant damp air.
    The water ingress could be from dirty wall ties causing a bridge across the cavity, mortar in the insulation leaking roof gutter without seeing it’s anyones guess
     
  5. mikejchapman

    mikejchapman New Member

    Not at the moment. It's brick, pine end and has no water running down it and the damp course should be ok. The dining rm was garage has always had a room above too.

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  6. flynnyman

    flynnyman Private Member

    So it was a single skin wall and you built a block wall in front? Did you insulate it?
     
  7. mikejchapman

    mikejchapman New Member

    No its always been double skin. Used to be a garage, but always had a room above. Didn't touch the wall at all.

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  8. johniosaif

    johniosaif Private Member

    Rip off the board that there ,you might get further information ,replace it with insulated board with a membranę , dąb it on with tile adhesive or just mechanical fix, make sure there's ventilation as stated above
     
  9. mikejchapman

    mikejchapman New Member

    Thanks John.

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  10. flynnyman

    flynnyman Private Member

    What did you do with the floor?
     
  11. mikejchapman

    mikejchapman New Member

    The floor was raised with concrete, self leveller and pva. In hindsight not the best as it's a cold floor as a result. I did once take some of the laminate up as i thought the floor must be damp but it was dry.

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  12. essexandy

    essexandy Private Member

    Just because it's damp where each dab of adhesive is doesn't mean that there's damp coming in, it is likely that each dab is a cold spot and that the surface of the wall has become the dew point.
    You should have at the very least checked that the cavity hadn't been bridged and preferably filled it with insulation.
     
  13. mikejchapman

    mikejchapman New Member

    The wall was already there, double skin wall block and brick. The inside of the wall was dry as a garage, i supposenit would have had plenty of air circulation as a garage, even if there was rubble in the cavity? It might be that as it was a garage they weren't so careful?

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  14. jet

    jet Active Member

    Should of had buildimg regs
    Which would of covered regs for habitable room ..
    Fire proofing /insulation/ventilation
    Means of escape damp proofing
     
  15. mikejchapman

    mikejchapman New Member

    It did mate.

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  16. Arti

    Arti Private Member

    Cut the dabs out and fill the holes with expanding foam. It's a better insulator and it won't allow the passage of moisture
     
    • Funny Funny x 1

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