Hmm. Unmanageable black mould on a bathroom ceiling. The property next door doesn't experience the same problem. We have an extractor fan (albeit a slightly rubbish one) and leave a window ajar permanently. Wondering if this is likely to be our own stuff (ie condensation) or a sign of a slow leak or similar from the flat above?
― djh, Thursday, 2 November 2017 19:23 (six years ago) link