Deflecting Drywall Ceiling

I just did a remodel and have a tile guy doing a fireplace. When he did it, I noticed where it met the ceiling that the ceiling is deflecting. In fact a/2 of the room separated by a beam is deflecting and the stone now accentuates this flaw. Is it normal for an older house for a newly installed drywall ceiling to accentuate imperfections in the ceiling framing. It was plastered before and I guess floated to compensate for this. Is looks bad and I don't want to rip the ceiling down now that it is painted and stone is applied. Any advice?
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You have to live with it, unless you are willing to rebuild the ceiling. Yes, it's normal for old buildings to be out of square. And, you are correct in thinking the plaster often hid some uneven framing. However, you didn't notice the condition until you looked carefully. It's probable that others will not notice the condition.
TB
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You might consider an indirect lighting cove or some other trim box to disguise the condition. You need to create a lot of shadow and contrast to truly disguise.
The other alternatives would require redoing the ceiling IMHO.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Keep the whole world singing. . . . DanG

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