Hi people, I have a unit in a unit block and the unit above me has the floor with this issue. Pic attached. Can anybody recommend the course of action? Our body corporate doesn't have too much money in the sinking fund. I also think its possible it will be extremely costly to fix, if other units in the complex have the same issue there are (72 units in the complex). For this unit, no single particular incident is known to have caused this problem therefore it cant come out of insurance. Thoughts welcome please.