Best practice for woodplank ceiling?
What’s gonna be up there are the bottom chords of the roof trusses, 24 inches on center. The desired ceiling finish is 1 x 8 pine, edge and centerbead pattern, a knotty pine rustic look.
If it were sheetrocked, we would strap on 16s with RC-channel and then just rock away, the taped joints satisfying the need for a vapor barrier between the warm conditioned space below and the cellulose insulation above.
But for the planking, I don’t think we just want to go right on the truss chords.
The ceiling is going up before the walls, of course.
We could staple up 6-mil poly sheeting, tape all joints, bring a few inches of poly down the faces of the top wallplates, then foamseal against that hem when gyprocking the walls.
We could screw 1″ rigid foamboard to the truss chords, foamseal joints, follow with 1×3 nailers screwed through to the truss chords.
We could 7/16 OSB the whole thing and tape the joints.
But what would you do?