It's a job a friend of mine was sent to, he wasn't too sure what it was so asked me, looks like lead dressed over the top of the wall with some sort of coping stone come slab laid over that, clearly must be some water ingress somewhere above and it's finding it's way out lower down, here's a pic from inside....
Just wondered what that deposit was that's seeping out
It's dot n dabbed inside onto blockwork, in fact both skins are blockwork, if there's a dab there could the salt transfer through it and in to the plasterboard? Whatever it is is bleeding out inside and outside albeit lower down outside, I'll probably end up going out to this so I'll have a better look
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