Placing walls beneath floating dormer walls

[modelBuilder]

It appears that there is another way to do this as well. There is an option in the wall specification dialogue under the roof tab that lets you choose "Lower wall type if split by butting roof." Specifying an interior wall type there takes care of the region of the wall in the living space, but the attic wall takes on the properties of the exterior wall. I suppose you can force a manual change on the attic wall to get it right if it's going to be visible.