Hi I own a flat and the old owner bodged the plumbing, horizontal piping, he boxed it in so it is unaccessible, but i noticed blobs of green in the joins and along the pipes and am worried about leaks because i have googled and found that green on pipes means leaks that can turn into disasters. i own my flat and it is top floor and i dont want leaks because the flat below has a false timber ceiling plus asbestos artex so it could be a disaster if pinhole leaks suddenly get bigger. The flat is 4o years old. I cannot afford a re pipe for the whole flat. I own the flat on a mortgage and am worried sick. The copper piping is horizontal and there is loads of green in the joins and on the underside of the pipes, its an emerald green colour. Sorry for all the posts but i have a fear of water leaks as i am in a top floor flat. Thank you for your help. The green is on the joins, elbows, and along the pipes, and I made the mistake of reading the internet and it says leaks leaks leaks which worries me sick. Any reassurance would be helpful. As mentioned in my other post, the flat is 40 yrs old, but as the old owner bodged the pipes, which he should not have touched, I could be in trouble with the freeholder as I am a homeowner but on a leasehold and not a freehold basis. yhanks for reading.