Hi Footprints, thanks for your reply. It is a huge mess and horrible eyesore (I think grass growing in guttering has caused water to collect and cause this damage). It is an old house, so possibly lath and plaster...
Thank you!
Water damage is causing this to come away from my ceiling. I'm concerned about what kind of ceiling it is, and wondering if any experts might have a better clue than me? (I know it's a state!)
Thanks