Hi, Wonder if someone can help please. I'm renovating some properties and as you can see from picture mould is appearing wherever the "dabs" are for the dry lining. The mould will rub off with you hand, but when the board is skimmed the mould returns on the finished plaster in exactly the same places, which again will rub off, but I wonder whether it will keep returning and why is it happening , as the walls in question are bone dry and the same happens whether it's new block walls or existing stone walls. Plasterer says it's nothing and probably to do with different dry lining adhesive he has used, which I know is drivel, unless the adhesive has already got mould in it. thanks