Crown moulding and drywall (to tape or not to tape?)
Some backround.. I have a 14' x 12' room with the original plaster walls intact and the plaster ceiling and lathe stripped down to the ceiling joists. I plan on drywalling the ceiling with 5/8" board perpedicular to the joists and backblocking the three butted seams I'll encounter. Crown moulding will be installed, and the original plaster walls (which are smooth) and the ceiling will both be given a light to medium skip-trowel plaster texture to match the rest of the house. My father in law has been a professional plasterer since he was young, so he will thankfully be doing that part of the work..
My concern relates to what to do with the corner where the new drywall ceiling meets the old plaster wall.. Can I skip taping the corner seam since it will be covered with crown anyway, or will this affect the drywalls structural performance?
I'd like to get the crown up before the final texture is applied to provide for a smooth flat surface for the crown to sit on and to ease installation. I realize as it is I will need to coat the factory tapered edges to level them out before installing the crown.. Does the compound and drywall need to be primed before installing the crown or should I just tape, mud, fasten the crown, then prime/texture/finish?