diff --git a/src/bonsai/bonsai/bim/module/model/slab.py b/src/bonsai/bonsai/bim/module/model/slab.py
index bf33b6f413..b362f1e736 100644
--- a/src/bonsai/bonsai/bim/module/model/slab.py
+++ b/src/bonsai/bonsai/bim/module/model/slab.py
@@ -298,8 +298,8 @@ class DumbSlabPlaner:
                 x, y, z = extrusion.ExtrudedDirection.DirectionRatios
                 existing_x_angle = tool.Model.get_existing_x_angle(extrusion)
                 perpendicular_depth = thickness * (1 / cos(existing_x_angle))
-                offset = layer_params["offset"]
-                offset_vector = Vector((0.0, 0.0, offset / self.unit_scale))
+                perpendicular_offset = layer_params["offset"] * (1 / cos(existing_x_angle))
+                offset_vector = Vector((0.0, 0.0, perpendicular_offset / self.unit_scale))
                 if layer_params["direction_sense"] == "POSITIVE":
                     y = abs(y) if existing_x_angle > 0 else -abs(y)
                     z = abs(z)
@@ -309,8 +309,8 @@ class DumbSlabPlaner:
                 extrusion.ExtrudedDirection.DirectionRatios = (x, y, z)
                 extrusion.Depth = perpendicular_depth
 
-                if offset != 0.0 and not extrusion.Position:
-                    tool.Model.add_extrusion_position(extrusion, offset)
+                if perpendicular_offset != 0.0 and not extrusion.Position:
+                    tool.Model.add_extrusion_position(extrusion, perpendicular_offset)
 
                 # Update the extrusion's location based on its current rotation angle and offset
                 if extrusion.Position:
diff --git a/src/bonsai/bonsai/bim/module/model/wall.py b/src/bonsai/bonsai/bim/module/model/wall.py
index 92be690b24..73df5e8d95 100644
--- a/src/bonsai/bonsai/bim/module/model/wall.py
+++ b/src/bonsai/bonsai/bim/module/model/wall.py
@@ -261,21 +261,15 @@ class ChangeExtrusionXAngle(bpy.types.Operator, tool.Ifc.Operator):
                     # Here we set the extrusion direction to negative if that's the case
                     x, y, z = extrusion.ExtrudedDirection.DirectionRatios
                     layer_params = tool.Model.get_material_layer_parameters(element)
-                    offset = layer_params["offset"]
-
-                    # Change offset to keep the position in relation to the top face of the slab
-                    # The x_angle changes the slab vertical depth, so we have to adapt the offset accordingly
-                    offset -= (extrusion.Depth - perpendicular_depth) * unit_scale
-
-                    offset_vector = Vector((0.0, 0.0, offset / unit_scale))
-
+                    perpendicular_offset = layer_params["offset"] * (1 / cos(x_angle))
+                    offset_vector = Vector((0.0, 0.0, perpendicular_offset / unit_scale))
                     if layer_params["direction_sense"] == "NEGATIVE":
                         y = -abs(y) if x_angle > 0 else abs(y)
                         z = -abs(z)
                     extrusion.ExtrudedDirection.DirectionRatios = (x, y, z)
 
-                    if offset != 0.0 and not extrusion.Position:
-                        tool.Model.add_extrusion_position(extrusion, offset)
+                    if perpendicular_offset != 0.0 and not extrusion.Position:
+                        tool.Model.add_extrusion_position(extrusion, perpendicular_offset)
 
                     # Update the extrusion's location based on its current rotation angle
                     if extrusion.Position: