The people next door have damp and the think it's coming from my brick outhouse. A few years ago they knocked down their side of the outhouse which extends form the back wall of the houses. We didn't have damp on the party wall when they suggested our outhouse was causing damp on their side. They want me to demolish the outhouse but I don't want to do that and since then they have taken on themselves to mess with the roof of my outhouse including applying tar and an rim to stop rain water falling their side, even-though the slop falls my side.
I know the is no damp in my outhouse as I use it to store stuff I want to keep and check it at regular times. Just wondering if anyone has experience of a similar problem, we've not fallen out with them but I don't like them messing on my property without even asking me first. When it start they came around with some "expert" and I showed them my side of the house wall and inside the outhouse and their was clearly no damp or water gathering in the floor of the outhouse.