The attic requires a lot of trimming as all attics do. It's best to work in segments, as you apply each panel because this half scale dollhouse, does not give you much room for accessibility.
I had to create a knee wall made of wider trim, along the attic walls, to hide a large gap where the back of the tower was visible.
I used a lighter wallpaper for the roof panels, to create a nice contrast and more detail.