if it's not your roof, and it's the side of the neighbour's house, it isn't your concern.
Post a pic of the rainwater pipe, it might not be ideally positioned.
I think the real problem is rainwater from the roof. Tinkering with the wall is not a solution unless there is some way of fitting a verge.
Post a pic of the rainwater pipe, it might not be ideally positioned.
I think the real problem is rainwater from the roof. Tinkering with the wall is not a solution unless there is some way of fitting a verge.