All wall types within the Basic Wall and Stacked Wall families have a type property called Function.
Specify one of the following values:
- Interior
- Exterior
- Foundation
- Retaining
- Soffit
- Core-Shaft
You can filter the display of walls in a view to show/hide only those walls that serve a particular function. When creating a wall schedule, you can also use this property to include or exclude walls according to function.