Can this be done without replacing the ceiling? The house was built in 1980, so I’m not surprised that there is warpage, but I’d like to hide it if possible.
High stretch paintable silicone with low shrink. Tape on the ceiling and the bookcase revealing the gap and an appropriate sized fondant tool can minimize the transition and give a clean look but the tape and a wet finger can do well enough.
InEnduringGrowStrong@sh.itjust.works 2 days ago
Paintable caulk