diff --git a/src/blenderbim/blenderbim/bim/module/model/slab.py b/src/blenderbim/blenderbim/bim/module/model/slab.py
index 622f447e83..327ab18c18 100644
--- a/src/blenderbim/blenderbim/bim/module/model/slab.py
+++ b/src/blenderbim/blenderbim/bim/module/model/slab.py
@@ -166,7 +166,7 @@ def calculate_quantities(usecase_path, ifc_file, settings):
     obj = settings["blender_object"]
     product = ifc_file.by_id(obj.BIMObjectProperties.ifc_definition_id)
     parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
-    if not parametric or parametric["Engine"] != "BlenderBIM.DumbLayer3":
+    if not parametric or "Engine" not in parametric or parametric["Engine"] != "BlenderBIM.DumbLayer3":
         return
     qto = ifcopenshell.api.run(
         "pset.add_qto", ifc_file, should_run_listeners=False, product=product, name="Qto_SlabBaseQuantities"
@@ -342,6 +342,23 @@ class DumbSlabPlaner:
             return
         new_thickness = sum([l.LayerThickness for l in new_material.MaterialLayers])
         material = ifcopenshell.util.element.get_material(settings["related_object"])
+
+        relating_type = settings["relating_type"]
+        if hasattr(relating_type, "HasPropertySets"):
+            psets = relating_type.HasPropertySets
+            if psets is not None:
+                for pset in psets:
+                    if hasattr(pset, "HasProperties"):
+                        pset_props = pset.HasProperties
+                        if pset_props is not None:
+                            for prop in pset_props:
+                                if prop.Name == "LayerSetDirection":
+                                    if hasattr(prop, "NominalValue"):
+                                        nominal_value = prop.NominalValue
+                                        if hasattr(nominal_value, "wrappedValue"):
+                                            if nominal_value.wrappedValue == "AXIS2":
+                                                return
+
         if material and material.is_a("IfcMaterialLayerSetUsage") and material.LayerSetDirection == "AXIS3":
             self.change_thickness(settings["related_object"], new_thickness)
 
diff --git a/src/blenderbim/blenderbim/bim/module/model/wall.py b/src/blenderbim/blenderbim/bim/module/model/wall.py
index 368c907350..441c6abd52 100644
--- a/src/blenderbim/blenderbim/bim/module/model/wall.py
+++ b/src/blenderbim/blenderbim/bim/module/model/wall.py
@@ -861,7 +861,7 @@ def calculate_quantities(usecase_path, ifc_file, settings):
     obj = settings["blender_object"]
     product = ifc_file.by_id(obj.BIMObjectProperties.ifc_definition_id)
     parametric = ifcopenshell.util.element.get_psets(product).get("EPset_Parametric")
-    if not parametric or parametric["Engine"] != "BlenderBIM.DumbLayer2":
+    if not parametric or "Engine" not in parametric or parametric["Engine"] != "BlenderBIM.DumbLayer2":
         return
     qto = ifcopenshell.api.run(
         "pset.add_qto", ifc_file, should_run_listeners=False, product=product, name="Qto_WallBaseQuantities"
@@ -941,6 +941,23 @@ class DumbWallPlaner:
             return
         new_thickness = sum([l.LayerThickness for l in new_material.MaterialLayers])
         material = ifcopenshell.util.element.get_material(settings["related_object"])
+
+        relating_type = settings["relating_type"]
+        if hasattr(relating_type, "HasPropertySets"):
+            psets = relating_type.HasPropertySets
+            if psets is not None:
+                for pset in psets:
+                    if hasattr(pset, "HasProperties"):
+                        pset_props = pset.HasProperties
+                        if pset_props is not None:
+                            for prop in pset_props:
+                                if prop.Name == "LayerSetDirection":
+                                    if hasattr(prop, "NominalValue"):
+                                        nominal_value = prop.NominalValue
+                                        if hasattr(nominal_value, "wrappedValue"):
+                                            if nominal_value.wrappedValue == "AXIS3":
+                                                return
+
         if material and material.is_a("IfcMaterialLayerSetUsage") and material.LayerSetDirection == "AXIS2":
             self.change_thickness(settings["related_object"], new_thickness)