Take a temporary look at hidden elements or unhide them.
Wall below the roof not showing as hidden in revit.
On the view control bar click reveal hidden elements.
Define the display settings for projection lines using the object styles or the override graphics in view functions in revit.
Follow these steps in order to get the desired display.
The appearance of invisible lines of walls floors framing columns and foundation elements are controlled by the following view parameters.
Revit controls the appearance of structural concrete components that are in a hidden state in a view.
Discipline must be set to structural to represent invisible lines as hidden.
In order to enable different view representations make sure that the option show family pre cut in plan views in the structural beam family is unchecked.