Hi all. I have just moved into a new house (built around 1980). The house is double glazed with some windows being newer than others.
I expect a bit of condenation however the plaster at the sides of the inner window sill and the plaster on the top edge of the window is mouldy on a lot of the windows in the house.
Anyone have any ideas on the problem other than condensation. Might it be that the windows need sealing from the outside etc.
Any help or advice greatly appreciated.