Finally got a chance to get a ladder out this weekend and take a look on the roof. Was only a brief look as it was very cold (fingers started to freeze within minutes) and the gutters were full of snowy stuff.
Anyway, on brief inspection couldn't see anything obvious. No cracked tiles, lead flashing looked OK, ridge tiles OK - wish I had seen something because then at least I would have something that I could put right. Now have to wait until the weather improves (again) so that I can get back out and take a closer look.
Meanwhile, I have discovered that the inside of the cavity wall is wetter the colder it is. Assume this is condensation? (There has been water ingress above at some point but think this is a different issue).
We have been having most windows and internal doors open at night and this has resulted in windows which are free from condensation in the mornings (which is brilliant). We don't have trickle vents on the windows so opening them is our only option. We can't, however, seem to stop condensation forming on the inside of the cavity wall.
I have read about DRILL VENTS and wondering if this would help, improve the air flow etc.? Have also read that gable ends can cause problems with condensation because there is no opening at the top of the cavity. Is there anything we can do to rectify this?
This is starting to drive me nuts because I'm at a loss as to know what to do. The leak at the top I can find and cure, but I don't know what to do about the condensation. If anyone has had a similar problem and can help that would be absolutely fantastic