"True. Maybe remove enough plaster to angle in a nozzle, but that does nothing for the vertical gaps. It is a shame that veneer plastering, over blueboard and a bonding agent, is a lost art. I would do almost anything to solve a…"
"If all these remedial actions seem difficult, why not waste the drywall? If you came down several inches from the ceiling, to avoid a corner joint, you could slide the door open and have easy access with foam or caulk, and be quite…"