How to do a drywall air barrier with exposed beams?
This is for a new house to be constructed hopefully starting Spring 2019. We want to have a drywall job that provides an excellent air barrier preventing exfiltration of interior air into the ceiling. In a regular ceiling I’d think a continuous plane of drywall would do the job. However this is a cathedral ceiling built on timber kingpost trusses that are exposed to the interior. In this case the ceiling drywall is not continuous but broken into sections by the exposed timbers? Any suggestions how best to get a solid air barrier? Is the only way to do this a tedious caulking-gluing-sealing job between the timbers, drywall and other framing? Any other great ideas?