Hi. I live in a semi detatched house. My adjoining neighbour has recently extended their house and their new wall now comes up to my conservatory wall, which is fine. However, since this wall has gone up, my conservatory wall has become wet inside and out. Their gutter overhangs mine, as opposed to having its own downpipe. It doesn't connect to my gutter, it's just a higher level so empties over it into mine and I feel that this may be causing the problem, as the water splashes down the wall. Is there any ruling that controls guttering at all? Or any advice would be gratefully received. Many thanks, Dave