Installing a tongue-and-groove ceiling | Terry Love Plumbing Advice & Remodel DIY & Professional Forum

I am looking to install a tongue-and-groove pine ceiling. The board width is about 5-1/2" once the boards are inserted and put together.

My question is in how you mount the boards to the ceiling. Do you use a nail gun and tack the boards down in the groove area? Do you use glue in addition to nailing the boards?

This is a vaulted ceiling.

Thanks