diff --git a/src/blenderbim/blenderbim/bim/module/model/__init__.py b/src/blenderbim/blenderbim/bim/module/model/__init__.py
index 802d4b7a20..944583776f 100644
--- a/src/blenderbim/blenderbim/bim/module/model/__init__.py
+++ b/src/blenderbim/blenderbim/bim/module/model/__init__.py
@@ -10,6 +10,7 @@ classes = (
     wall.FlipWall,
     wall.SplitWall,
     wall.AddWallOpening,
+    slab.AddSlabOpening,
     prop.BIMModelProperties,
     ui.BIM_PT_authoring,
     ui.BIM_PT_authoring_architectural,
diff --git a/src/blenderbim/blenderbim/bim/module/model/slab.py b/src/blenderbim/blenderbim/bim/module/model/slab.py
index 26b47def02..9aefba63c7 100644
--- a/src/blenderbim/blenderbim/bim/module/model/slab.py
+++ b/src/blenderbim/blenderbim/bim/module/model/slab.py
@@ -195,6 +195,44 @@ def calculate_quantities(usecase_path, ifc_file, settings):
     PsetData.load(ifc_file, obj.BIMObjectProperties.ifc_definition_id)
 
 
+class AddSlabOpening(bpy.types.Operator):
+    bl_idname = "bim.add_slab_opening"
+    bl_label = "Add Slab Opening"
+    bl_options = {"REGISTER", "UNDO"}
+
+    def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
+        selected_objs = context.selected_objects
+        if len(selected_objs) == 0 or not context.active_object:
+            return {"FINISHED"}
+        slab_obj = context.active_object
+        if not slab_obj.BIMObjectProperties.ifc_definition_id:
+            return {"FINISHED"}
+        slab = IfcStore.get_file().by_id(slab_obj.BIMObjectProperties.ifc_definition_id)
+        if not slab.is_a("IfcSlab"):
+            return {"FINISHED"}
+        local_location = slab_obj.matrix_world.inverted() @ context.scene.cursor.location
+        raycast = slab_obj.closest_point_on_mesh(local_location, distance=0.01)
+        if not raycast[0]:
+            return {"FINISHED"}
+        bpy.ops.mesh.primitive_cube_add(size=slab_obj.dimensions[2] * 2)
+        opening = bpy.context.selected_objects[0]
+
+        # Place the opening in the middle of the slab
+        global_location = slab_obj.matrix_world @ raycast[1]
+        normal = raycast[2]
+        normal.negate()
+        global_normal = slab_obj.matrix_world.to_quaternion() @ normal
+        opening.location = global_location + (global_normal * (slab_obj.dimensions[2] / 2))
+
+        opening.rotation_euler = slab_obj.rotation_euler
+        opening.name = "Opening"
+        bpy.ops.bim.add_opening(opening=opening.name, obj=slab_obj.name)
+        return {"FINISHED"}
+
+
 class DumbSlabGenerator:
     def __init__(self, relating_type):
         self.relating_type = relating_type
diff --git a/src/blenderbim/blenderbim/bim/module/model/wall.py b/src/blenderbim/blenderbim/bim/module/model/wall.py
index 92ad70346b..761ecb7959 100644
--- a/src/blenderbim/blenderbim/bim/module/model/wall.py
+++ b/src/blenderbim/blenderbim/bim/module/model/wall.py
@@ -42,6 +42,9 @@ class AddWallOpening(bpy.types.Operator):
     bl_options = {"REGISTER", "UNDO"}
 
     def execute(self, context):
+        return IfcStore.execute_ifc_operator(self, context)
+
+    def _execute(self, context):
         selected_objs = context.selected_objects
         if len(selected_objs) == 0 or not context.active_object:
             return {"FINISHED"}
diff --git a/src/blenderbim/blenderbim/bim/module/model/workspace.py b/src/blenderbim/blenderbim/bim/module/model/workspace.py
index edc51476ec..164af0ae99 100644
--- a/src/blenderbim/blenderbim/bim/module/model/workspace.py
+++ b/src/blenderbim/blenderbim/bim/module/model/workspace.py
@@ -97,4 +97,4 @@ class Hotkey(bpy.types.Operator):
         if self.props.ifc_class == "IfcWallType":
             bpy.ops.bim.add_wall_opening()
         elif self.props.ifc_class == "IfcSlabType":
-            pass
+            bpy.ops.bim.add_slab_opening()