I have been search through posts and see many different ways. Thought I would start one just to bring it all in one place. I plan to start my first interior walls this week end and can not decide how to do them.
I have seen using 3/4 plywood. Solid core doors and 2 x 4 framed in walls like a house. But I think that would take up too much space.
Please let me know your ideas, and I expect nat to tell me how to do it right.
I was planning 2x4 construction for the walls. My floorplan already takes that into account, since Visio's default walls are 2x4s anyway. I was also planning to lay the acoustical barrier then start framing the walls before putting down full floor insulation.
I would agree that steel studs would be the way to go in a large roomy bus like yours. However, (don't you just hate that?) You might want to research the engineering behind steel studs. I seem to remember some discussion related to the need to sheet the studs before they would develop their support function. Still, steel studs would be much lighter than wood and for non-beavers like me, much easier to work with than wood.
Stud walls are nice as chases for wiring and plumbing (I'd go with steel studs myself) but in some spots your "wall" could be just a single sheet of plywood. The "walls" between our kitchen/dinette area and the bed/shower area are two floor to ceiling closets built like face frame kitchen cabinets. No lost space and much lighter than two double sheeted stud walls.
The ends of bunks lend themselves very well to just slapping on a single sheet. The bunk frame provides the rigidity and the plywood ends provide privacy.
Here are our closets. The divider between the bed and the shower is one sheet of pine plywood with an oak stiffener glued to the end grain to dress it up.