diff --git a/backend/Property.py b/backend/Property.py
index 52e8c213..91c1265a 100644
--- a/backend/Property.py
+++ b/backend/Property.py
@@ -1261,6 +1261,11 @@ class Property:
             # may be installed such that they are not visible from the street
             return False
 
+        if (self.data["property-type"] in ["House", "Bungalow"]) and (
+            not pd.isnull(self.roof["thermal_transmittance"])
+        ):
+            return True
+
         is_valid_property_type = self.data["property-type"] in ["House", "Bungalow", "Maisonette"]
         is_valid_roof_type = (
             self.roof["is_flat"] or self.roof["is_pitched"] or self.roof["is_roof_room"]