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  • Did not see your earlier post but looks like cement yes render coat, plaster gypsum skim coat which for some reason has been painted with gloss paint then at a later date skimmed again.
    So yes plenty of layers to attract moisture but is the damp really that bad? I can not see from this photo

  • Before I took all the paint off. To be fair it is looking better, this photo was 6 months ago. You can’t tell in the photo there is still some tide mark visible.

    Looking back at the old photo I hadn’t realised it’s way better


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  • Visible marks doesn't mean it's still damp necessarily. The damp will have moved anything soluble around with it which usually means you can still "see" it after it's dry.

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