The ceiling in my house was first covered with 1"x8" pine shiplap. And then 12"x12" acoustic tiles were stapled on. I am going to sheetrock the kitchen/dining room ceiling that is 10' by 23' can I use sheets that are 10' x 4' all the way across or do I need to place them like floor or roof decking to stagger the joints? I plan on putting the sheetrock on top of the acoustical tiles will that be a problem? I am also planning on sheetrocking 2 walls that are 10' 8" long and 8' high with 8'x4'x1/2" sheets that are now covered with 1/4" plywood both of these walls abutt to 1/2" sheetrock. Would it be better to remove the plywood first or try to hide the joints with moulding on the cabinets? And finally should I do the walls first or the ceiling? Thank you Chuck.

We added a sunroom onto the back of our house, and we want to do something to the wall that used to be the exterior of the house but is now part of an interior room. I was thinking we could put up plywood over the aluminum siding and paint a mural on it. There is a hot tub in the room, so it can get a bit humid. So I had another idea. Could we cover the siding with stucco lathe and put stuco on it? How would that work over aluminum siding where the space behind the lathe would not be uniform due to the nature of the siding? What do you think? And which idea do you like better; the plywood with mural, or the stucco?