diff --git a/recommendations/WallRecommendations.py b/recommendations/WallRecommendations.py
index 7aeabc7a..edfc4d66 100644
--- a/recommendations/WallRecommendations.py
+++ b/recommendations/WallRecommendations.py
@@ -236,8 +236,8 @@ class WallRecommendations(Definitions):
             # + it already has a U-value better than the building regulations, so we don't need to recommend anything
             if (
                 (not is_cavity_wall)
-                and (self.property.year_built >= self.YEAR_WALLS_BUILT_WITH_INSULATION)
-                and (u_value <= self.BUILDING_REGULATIONS_PART_L_MAX_U_VALUE)
+                and ((self.property.year_built >= self.YEAR_WALLS_BUILT_WITH_INSULATION)
+                     or (u_value <= self.BUILDING_REGULATIONS_PART_L_MAX_U_VALUE))
             ):
                 # Recommend nothing
                 return