Hello Have a issue where every time it rains we get: - moisture (not rain water!) running down across a stretch of wall in the kitchen - greasy, wet to touch ceiling patch (but water is NOT running through) This happens along the wall that contains a chimney breast that is no longer in use. We have had the roof recently cleaned and acropol / cement used to tidy up bits and pieces (it is an old roof) but it appears that these haven't fixed the issue as after the rain today the patch is wet to touch again. Any pointers would be greatly appreciated! Thanks!!