diff --git a/flow360/component/simulation/models/surface_models.py b/flow360/component/simulation/models/surface_models.py
index d3bc4a171..54b5b9f1e 100644
--- a/flow360/component/simulation/models/surface_models.py
+++ b/flow360/component/simulation/models/surface_models.py
@@ -332,6 +332,7 @@ class WallRotation(Flow360BaseModel):
 class Wall(BoundaryBase):
     """
     :class:`Wall` class defines the wall boundary condition based on the inputs.
+    Refer  :ref:`here <wall_formulations>` for formulation details.
 
     Example
     -------
@@ -380,6 +381,14 @@ class Wall(BoundaryBase):
       ...     ),
       ... )
 
+    - Define roughness height on entities
+      with the naming pattern :code:`"fluid/Roughness-*"`:
+
+      >>> fl.Wall(
+      ...     entities=volume_mesh["fluid/Roughness-*"],
+      ...     roughness_height=0.1 * fl.u.mm,
+      ... )
+
     ====
     """