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  • I had this in my old flat, created by weathered (cheap) external rendering, thus making is permeable

    It was difficult to diagnose, they spend a while inspecting the flat roof and gutters. It was probably a multitude of problems but they identified this as the main cause for ingress

  • Yep, we've had this. Water literally dripping though the top of a window due to blown render outside (combined with a clogged gutter chucking water at the wall).

    Fixing those two things seems to have sorted it.

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