I hade a carpenter put new sheetrock on my cieling, when he was done, now there is a bulge in the center of the room, from one wall to the opposing wall. I never had a bulge there before. I think the cieling beam behind the bulge is about a 1/2 inch lower than the rest of the cieling beams. I dont know what to do now! The carpenter said he thought the beams were at the same level but didnt check them, since the old sheetrock was level. I tend to think there might have been shims or spacers on the other beams to match the level to the lower one! That the carpenter should have checked the levelness of the beams that the sheetrock panels are screwed to. What to do now, thats the question, should i put shims on the sheetrock with glue and put another set of sheetrock panels over that. How would I check the levelness also....or remove the cieling again, then what do I do? Help Help Please....Needless to say I didnt pay the carpenter all he requested cause the finnished job is not acceptable.