diff --git a/src/bonsai/bonsai/core/covering.py b/src/bonsai/bonsai/core/covering.py
index a6b9912505..ffc140dac6 100644
--- a/src/bonsai/bonsai/core/covering.py
+++ b/src/bonsai/bonsai/core/covering.py
@@ -51,7 +51,7 @@ def add_instance_flooring_covering_from_cursor(
     if isinstance(space_polygon, str):
         return
 
-    bm = spatial.get_bmesh_from_polygon(space_polygon, h=0)
+    bm = spatial.get_bmesh_from_polygon(space_polygon, h=0, polygon_is_si=True)
     name = "Covering"
     mesh = spatial.get_named_mesh_from_bmesh(name=name, bmesh=bm)
 
@@ -65,7 +65,6 @@ def add_instance_flooring_covering_from_cursor(
 
     spatial.assign_swept_area_outer_curve_from_2d_vertices(obj, vertices=points)
     body = spatial.get_body_representation(obj)
-    print(obj, body)
     spatial.regen_obj_representation(obj, body)
 
 
@@ -96,7 +95,7 @@ def add_instance_ceiling_covering_from_cursor(
     if isinstance(space_polygon, str):
         return
 
-    bm = spatial.get_bmesh_from_polygon(space_polygon, h=0)
+    bm = spatial.get_bmesh_from_polygon(space_polygon, h=0, polygon_is_si=True)
     name = "Covering"
     mesh = spatial.get_named_mesh_from_bmesh(name=name, bmesh=bm)
 
@@ -128,7 +127,7 @@ def regen_selected_covering_object(root: type[tool.Root], spatial: type[tool.Spa
     if isinstance(space_polygon, str):
         return
 
-    bm = spatial.get_bmesh_from_polygon(space_polygon, h=0)
+    bm = spatial.get_bmesh_from_polygon(space_polygon, h=0, polygon_is_si=True)
 
     name = "Aux"
     mesh = spatial.get_named_mesh_from_bmesh(name=name, bmesh=bm)
@@ -152,7 +151,7 @@ def add_instance_flooring_coverings_from_walls(root: type[tool.Root], spatial: t
     union = spatial.get_union_shape_from_selected_objects()
     for i, linear_ring in enumerate(union.interiors):
         poly = spatial.get_buffered_poly_from_linear_ring(linear_ring)
-        bm = spatial.get_bmesh_from_polygon(poly, h=0)
+        bm = spatial.get_bmesh_from_polygon(poly, h=0, polygon_is_si=False)
 
         name = "Covering" + str(i)
         obj = spatial.get_named_obj_from_bmesh(name, bmesh=bm)
@@ -180,7 +179,7 @@ def add_instance_ceiling_coverings_from_walls(
     union = spatial.get_union_shape_from_selected_objects()
     for i, linear_ring in enumerate(union.interiors):
         poly = spatial.get_buffered_poly_from_linear_ring(linear_ring)
-        bm = spatial.get_bmesh_from_polygon(poly, h=0)
+        bm = spatial.get_bmesh_from_polygon(poly, h=0, polygon_is_si=False)
 
         name = "Covering" + str(i)
         obj = spatial.get_named_obj_from_bmesh(name, bmesh=bm)
diff --git a/src/bonsai/bonsai/core/spatial.py b/src/bonsai/bonsai/core/spatial.py
index e13ea8cfca..6aa148c23c 100644
--- a/src/bonsai/bonsai/core/spatial.py
+++ b/src/bonsai/bonsai/core/spatial.py
@@ -247,7 +247,7 @@ def generate_spaces_from_walls(
     for i, linear_ring in enumerate(union.interiors):
         poly = spatial.get_buffered_poly_from_linear_ring(linear_ring)
 
-        bm = spatial.get_bmesh_from_polygon(poly, h)
+        bm = spatial.get_bmesh_from_polygon(poly, h, polygon_is_si=False)
 
         name = "Space" + str(i)