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  • Thanks for the reply.
    So removing the crappy, crumbling slates to look for the DPC could be a good start?
    When you say stripping the plaster do you mean inside?
    Only recently laid a nice oak floor and decorated - not the news I wanted! (but thanks very much regardless!) If there's any other, less invasive things to consider first then I'm all ears. Otherwise I guess I'll have to accept that we're going to make a mess...

  • So removing the crappy, crumbling slates to look for the DPC could be a good start?

    I reckon. If it's been cemented on, though, it may damage the brickwork when you remove it.

    Also worth nothing that some buildings of that ear have slate DPC (also pitch, sometime none).

    Taking the plaster off would allow you to see the problem with less stuff in the way, and to see if it dries with the outside fixes.

    If it didn't, that's when I'd be thinking about lifting the floor.

    Was there no damp when you laid the floor? Do you know what's under there?

  • Yeah there was some damp before. The old joists were rotten. Beneath the floor was full of rubble and crap that the builder said had breached the damp proof course and was confident we’d sorted the issues. Seems that we haven’t though...

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