The house I bought has sheetrocked walls and 1'X1' interlocking tiles for the ceiling. I am looking at replacing the ceiling with sheetrock and wonder if there are any issues or concerns with having the walls rocked and then the ceiling. I have always read to do the ceiling first but would hate to rip down the sheetrock on the walls just to have it that way.
Read about this the other day. ceiling first helps prevent cracks and when the wall is done it helps hold up the ceiling, do a good job on the ceiling and you shouldn't have problems. make sure you do a good job mudding between the ceiling and the wall or you will get cracking.
i'm sure some one more knowledgeable will post too.