diff --git a/src/c3nav/routing/level.py b/src/c3nav/routing/level.py
index 955c663c..12dee296 100644
--- a/src/c3nav/routing/level.py
+++ b/src/c3nav/routing/level.py
@@ -284,14 +284,22 @@ class GraphLevel():
 
     def collect_arealocation_points(self):
         self.arealocation_points = {}
+
+        for room in self.rooms:
+            room.excludables = []
+
         for name, arealocation in self._built_arealocations.items():
             mpl_area = shapely_to_mpl(arealocation)
 
             rooms = [room for room in self.rooms
                      if any(room.mpl_clear.intersects_path(exterior, filled=True) for exterior in mpl_area.exteriors)]
             possible_points = tuple(point for point in sum((room._built_points for room in rooms), []) if point.room)
-            self.arealocation_points[name] = tuple(point.i for point in possible_points
-                                                   if mpl_area.contains_point(point.xy))
+            points = tuple(point for point in possible_points if mpl_area.contains_point(point.xy))
+            self.arealocation_points[name] = tuple(point.i for point in points)
+
+            if name in self._built_excludables:
+                for room in set(point.room for point in points):
+                    room.excludables.append(name)
 
     # Drawing
     ctype_colors = {
diff --git a/src/c3nav/routing/room.py b/src/c3nav/routing/room.py
index 802d9341..f3275bdd 100644
--- a/src/c3nav/routing/room.py
+++ b/src/c3nav/routing/room.py
@@ -28,6 +28,7 @@ class GraphRoom():
         self.room_transfer_points = None
         self.distances = np.zeros((1, ))
         self.ctypes = None
+        self.excludables = None
 
     def serialize(self):
         return (
@@ -37,12 +38,14 @@ class GraphRoom():
             self.room_transfer_points,
             self.distances,
             self.ctypes,
+            self.excludables,
         )
 
     @classmethod
     def unserialize(cls, level, data):
         room = cls(level)
-        room.mpl_clear, areas, room.points, room.room_transfer_points, room.distances, room.ctypes = data
+        (room.mpl_clear, areas, room.points, room.room_transfer_points,
+         room.distances, room.ctypes, room.edcludables) = data
         room.areas = tuple(GraphArea(room, *area) for area in areas)
         return room
 
@@ -212,6 +215,7 @@ class GraphRoom():
         self.areas = tuple(self.areas)
         self.points = tuple(point.i for point in self._built_points)
         self.room_transfer_points = tuple(i for i in self.points if i in self.level.room_transfer_points)
+        self.excludables = tuple(self.excludables)
 
         mapping = {point.i: i for i, point in enumerate(self._built_points)}