Until now, a wall can be only vertical and Sweet Home 3D doesn't know anything about roofs (even if it can handle ceilings).
So, only workarounds are possible. One could be to transform a wall with a window as a roof part with a window:
- draw a wall at the same size as the roof part you want
- place a window in the wall (for example the fixed window)
- eventually change the textures of the wall
- select the wall and the window(s)
- choose 3D view > Export to OBJ format menu item to save the selection in an OBJ file
- import the exported OBJ file, and rotate it if needed at the second step of the furniture import wizard.
Hope you can handle it
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Emmanuel Puybaret, Sweet Home 3D creator
