My home has a vaulted ceiling in the living room. I have noticed that there is discoloration on the sheet rock that coincides with what I think are location of sheet rock screws. I have had a roofer check and there is no roof leak. I am wondering if the area between rafters is properly vented. There are roof vents in the roof but not between each rafter. There are vents in the blocking between each rafter tail.

Should the area be vented with a continuous ridge vent? It would seem that the area is not vented to allow air circulation and that would result in condensation between rafters which is showing up in the area of the sheet rock screws.