Bead board or wainscoting on interior and exterior walls
So after reading about installing tongue and grove on a cathedral ceiling I learned that drywall should be installed before the tongue and groove. Because of the extra work and expense we are going to leave the ceiling drywall for now but because we are skipping out on the wood ceiling I would like to put up some wood on some of the exterior and/or interior walls. I’m wondering if we need to put up drywall first as we would in the ceiling for air sealing or can we skip this step on the walls. The walls are 2×4 construction with r15 roxul.