Originally Posted by kok328
Roof leaks can be tricky to locate. The leak could be several feet away from where you see it in on the ceiling. Getting into the attic during a heavy rain will reveal alot.
This is especially true when there is a vapour barrier above the drywall. Water can get to the vapour barrier and then run to the low spot maybe in the center of the room if the ceiling sag or the edge of the ceiling if the joists are crowned up, once it finds a screw hole or some path to get thru it can still travel some distance between the vapour barrier and the drywall.