mold and condensation in and around the windows?

Hi anyone knows why I'm getting the rust and condensation on the windows of my apartment and ceilings. PVC double glazing only 10 years old, the house only 30 years. About five years ago, a neighbor convinced me to take old sofits and pvc and fascias. Last year alone do me round air vents in the siding. if this is what is wrong with the ventilation holes around the dry time? I appreciate this is a lot of assumptions on my part, but I'm trying to solve the problem without having the builders / roofers no doubt want to take the entire roof, put a new damp proof course ….. (Apologies to all people of good reputation, honest trade.

you only get the mold and condensation where no air flow .. ie lack of ventilation … however, soffitts vents or lack of them will not make your problem,,, air vents soffitto the roof space … however, its very important that the insulation is not going over the area soffitto … must end in brick during an internal or … everything must be at least 8 ".. (200 mm) thick ….. as room problems. . Sounds like there is enough insulation in the roof and the windows open? … makes your windows have vents splash .. Reg now is a new PVC windows build .. have modern air gap of 20 mm …. clean all surfaces with Dettol .. going to kill the spores .. treated as a experiment to leave the bedroom door ajar often heals .. if it works, you know you need more ventilation … air like a brick … ps .. I am a builder