Working with Roofs
Use the Loft Walls to split the space in the loft. Unlike the standard walls (the Storey Walls), the height of Loft Walls is not fixed by the current storey height. Loft Wall height follows the ceiling height even if the ceiling is sloped. Unlike other wall types, Loft Walls don't change the shape of the roof.
The same tool in the toolbar is used to add walls of any type. The default wall type is Storey Wall. When you add walls in the loft, the program automatically switches to the Loft Wall type. To change the wall type, use the Type pop-up menu in the Object Properties tab of the Inspector.