After the third floor paint dried, I began wallpapering the attic, keeping in mind the visible roof supports. Unlike The Beacon Hill Dollhouse, this attic has no walls to conceal these supports. I decided to stain the roof supports, which was the simplest finishing method. Alternatively, you could paint them or attempt wallpapering. When installing, ensure the supports are correctly positioned with their slope facing the interior, and only glue them at the bottom against the floor.
The dollhouse's steep roof required special panel preparation. The original wooden panels were too rigid to bend, even after scoring and attempting to wet them. Ultimately, I discarded these panels and opted for stiff, thin cardboard as a more flexible alternative. Craft stores also offer thin veneer wood, which could work if large enough. Basswood would be too hard, balsa wood too soft, and foam core would crease under the steep slope.
I wallpapered the cardboard's interior side before installation, as this couldn't be done later. Any slight warping would be straightened when glued to the supports, and the wallpaper paste would add rigidity.
After staining the roof ceiling to match the supports, I installed the roof, using heavy clamping to ensure a secure fit.