diff --git a/etl/epc_clean/epc_attributes/FloorAttributes.py b/etl/epc_clean/epc_attributes/FloorAttributes.py
index 817c2b43..c9c2abab 100644
--- a/etl/epc_clean/epc_attributes/FloorAttributes.py
+++ b/etl/epc_clean/epc_attributes/FloorAttributes.py
@@ -11,7 +11,7 @@ class FloorAttributes(Definitions):
     # For the short term, while we are still exploring the data, we maintain a list of error cases which
     # we want to ignore and consider as no data.
 
-    OBSERVED_ERRORS = ["Conservatory"]
+    OBSERVED_ERRORS = ["Conservatory", "insulated"]
 
     WELSH_TEXT = {
         "(anheddiad arall islaw)": "(another dwelling below)",