https://imgur.com/B8HOaNg (interior wall)
https://imgur.com/a/I7YlOKJ (exterior wall with estimate of where the damp patch is coming from)
Hi All
A damp patch has appeared in the middle of my wall (no issues ceiling or floor) as you can see in the photo above. The patch is at where my wall joins with my neighbours.
Any ideas on what the issue could be? Should I contact a builder?
I'm on the top floor flat of a victorian conversion.
Any advice would be appreciated. I'm not a DIYer so will need to call in the professionals but not sure where to start