Apply construction adhesive to the back of. That will ensure a reveal albeit a narrow one at the. Take care installing beadboard over drywall.
Brad nail into the ceiling.
That will ensure a reveal albeit a narrow one at the. If you have ceiling beams run the panels perpendicular to beams for an interesting twist. This orientation allows each ceiling board to be nailed to each of the ceiling joists. Cut down the beadboard including cut outs for lights and vents.