Above my front door is a concrete ceiling approx 130cm x 70xm. the door is upvc with 2 small non opening upvc side windows to the side of the door. I am getting condensation at the point where the door & window frames meet the ceiling. I have a mini dehumidifier on the shelf next to the door which doesnt appear to be improving the problem. What can I do to stop this condensation. I do not have condensation anywhere else in the house