I am new to this site, so hello to all of you and hope you can give me some advice. We have a ceiling that is leaking from an overhead balcony. The building is 3 level and is new, been built around 12 months. Builder came out today and removed some of the ceiling and told us where the leak is on the balcony. Apparently it happened once before and he thought it was fixed. The person who laid the membrane was also here inspecting it. They said they need a dry day to repair this and will use some type of cork material to seal it. They said it is only a tiny pinhole but it allows the rain to come in and run across the ceiling. I am concerned that this may not be a permanent fix and that the wood inside the plaster which has got wet will end up being damaged and rotting. The builder did say this can be a problem with over head balconies. Has anyone else experienced anything like this and if so what was the outcome ?