diff --git a/src/blenderbim/blenderbim/bim/module/model/opening.py b/src/blenderbim/blenderbim/bim/module/model/opening.py
index cf2ba2cf5b..ea1868c10f 100644
--- a/src/blenderbim/blenderbim/bim/module/model/opening.py
+++ b/src/blenderbim/blenderbim/bim/module/model/opening.py
@@ -44,6 +44,8 @@ class AddFilledOpening(bpy.types.Operator, tool.Ifc.Operator):
     filling_obj: bpy.props.StringProperty()
 
     def _execute(self, context):
+        props = context.scene.BIMModelProperties
+
         voided_obj = bpy.data.objects.get(self.voided_obj)
         filling_obj = bpy.data.objects.get(self.filling_obj)
         filling = tool.Ifc.get_entity(filling_obj)
@@ -66,7 +68,11 @@ class AddFilledOpening(bpy.types.Operator, tool.Ifc.Operator):
         new_matrix = voided_obj.matrix_world.copy()
         new_matrix.col[3] = tool.Cad.point_on_edge(target, axis).to_4d()
         if not filling.is_a("IfcDoor"):
-            new_matrix[2][3] = target[2]
+            container = ifcopenshell.util.element.get_container(element)
+            if container:
+                container_obj = tool.Ifc.get_object(container)
+                if container_obj:
+                    new_matrix[2][3] = container_obj.matrix_world[2][3] + props.rl
         filling_obj.matrix_world = new_matrix
         bpy.context.view_layer.update()
 
diff --git a/src/blenderbim/blenderbim/bim/module/model/prop.py b/src/blenderbim/blenderbim/bim/module/model/prop.py
index b9a5b54a95..e038ab234a 100644
--- a/src/blenderbim/blenderbim/bim/module/model/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/model/prop.py
@@ -203,3 +203,4 @@ class BIMModelProperties(PropertyGroup):
     x: bpy.props.FloatProperty(name="X", default=0.5)
     y: bpy.props.FloatProperty(name="Y", default=0.5)
     z: bpy.props.FloatProperty(name="Z", default=0.5)
+    rl: bpy.props.FloatProperty(name="RL", default=1)
diff --git a/src/blenderbim/blenderbim/bim/module/model/workspace.py b/src/blenderbim/blenderbim/bim/module/model/workspace.py
index 395d102fee..7433b5232e 100644
--- a/src/blenderbim/blenderbim/bim/module/model/workspace.py
+++ b/src/blenderbim/blenderbim/bim/module/model/workspace.py
@@ -219,6 +219,9 @@ class BimTool(WorkSpaceTool):
                 row.operator("bim.extend_profile", icon="X", text="").join_type = ""
 
             if ifc_class in ("IfcWindowType", "IfcDoorType"):
+                row = layout.row(align=True)
+                row.prop(data=props, property="rl", text="RL")
+
                 row = layout.row(align=True)
                 row.label(text="", icon="EVENT_SHIFT")
                 row.label(text="", icon="EVENT_G")