Hello just signed up so new to this. I have a problem with condensation on my internal wall. I have recently just put insulation down in our loft and also put up a stud wall in our front room. This was due to my partner always saying the house is cold. We noticed condensation marks on our wall which is down one side of the house. Does anyone have any advise as one of my nieghbours has said i need a new roof....The house was built in the mid 1950's...