Embarrassing question from a completely non handy person. We have damp (and mould) that has appeared on the ceiling above the external wall of our bedroom- the length of the wall. It is just the one room and not on the same wall/ceiling of the room next door. We had a much more minor case last winter that was just in one corner and went when we had the gutters cleaned, so I assumed they had been blocked and we had sorted the issue. It was then summer and we didn’t have any problems.
The gutters have been cleaned and we always have the windows open for an hour or so each day for ventilation. I’ve been into the attic and can’t see any leaks, the roof looks okay from the ground (no missing tiles etc.) Who do we need to contact to get this sorted/find out the cause? Would it be a roofer even though we can’t see an obvious roof problem? I looked online and google recommended a damp proofer but the websites seem to suggest they work more with properties that have widespread damp from poor insulation/old buildings. Our damp is in one particular place. It is annoying though as the room has started smelling dank and I’m worried it may lead to a bigger (and more expensive) problem.
Any advice would be great, thank you.