Just as roofs, floors, and ceilings in Revit can consist of multiple horizontal layers, walls can consist of more than one vertical layer or region. The position, thickness, and material for each layer and region are defined through the type properties of the wall.
7-layer wall shown in plan view
You can add, delete, or modify individual layers and regions, or add sweeps and reveals to customize the wall type.
Note: Revit MEP does not support sweeps and reveals in walls.