diff --git a/.idea/Model.iml b/.idea/Model.iml
index 4413bb06..b0f9c00d 100644
--- a/.idea/Model.iml
+++ b/.idea/Model.iml
@@ -7,7 +7,7 @@
       <sourceFolder url="file://$MODULE_DIR$/open_uprn" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/recommendations" isTestSource="false" />
     </content>
-    <orderEntry type="jdk" jdkName="Python 3.10 (backend)" jdkType="Python SDK" />
+    <orderEntry type="jdk" jdkName="Python 3.10 (model_data)" jdkType="Python SDK" />
     <orderEntry type="sourceFolder" forTests="false" />
   </component>
   <component name="PyNamespacePackagesService">
diff --git a/.idea/misc.xml b/.idea/misc.xml
index 6f308057..1122b380 100644
--- a/.idea/misc.xml
+++ b/.idea/misc.xml
@@ -3,7 +3,7 @@
   <component name="Black">
     <option name="sdkName" value="Python 3.10 (backend)" />
   </component>
-  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.10 (backend)" project-jdk-type="Python SDK" />
+  <component name="ProjectRootManager" version="2" project-jdk-name="Python 3.10 (model_data)" project-jdk-type="Python SDK" />
   <component name="PythonCompatibilityInspectionAdvertiser">
     <option name="version" value="3" />
   </component>
diff --git a/recommendations/Costs.py b/recommendations/Costs.py
index a57092f9..0d9031b2 100644
--- a/recommendations/Costs.py
+++ b/recommendations/Costs.py
@@ -315,7 +315,9 @@ class Costs:
 
         subtotal_before_profit = labour_costs + materials_costs
 
-        contingency_cost = subtotal_before_profit * self.CONTINGENCY
+        # Because of the possiblity of damage to the existing floor, or difficulties associated to moving fittings,
+        # we use a higher contingency rate
+        contingency_cost = subtotal_before_profit * self.HIGH_RISK_CONTINGENCY
         preliminaries_cost = subtotal_before_profit * self.PRELIMINARIES
         profit_cost = subtotal_before_profit * self.PROFIT_MARGIN
 
diff --git a/recommendations/tests/test_costs.py b/recommendations/tests/test_costs.py
index 1d66ff47..1d519b91 100644
--- a/recommendations/tests/test_costs.py
+++ b/recommendations/tests/test_costs.py
@@ -240,7 +240,7 @@ class TestCosts:
         )
 
         assert sus_floor_results == {
-            'total': 3114.6027360000003, 'subtotal': 2595.50228, 'vat': 519.100456, 'contingency': 185.39302,
+            'total': 3337.07436, 'subtotal': 2780.8953, 'vat': 556.17906, 'contingency': 370.78604,
             'preliminaries': 185.39302, 'material': 483.405, 'profit': 370.78604, 'labour_hours': 54.940000000000005,
             'labour_days': 2.289166666666667, 'labour_cost': 1370.5252
         }
diff --git a/recommendations/tests/test_floor_recommendations.py b/recommendations/tests/test_floor_recommendations.py
index 01bd308e..43e98d60 100644
--- a/recommendations/tests/test_floor_recommendations.py
+++ b/recommendations/tests/test_floor_recommendations.py
@@ -81,7 +81,7 @@ class TestFloorRecommendations:
         assert types == {"suspended_floor_insulation"}
 
         assert len(recommender.recommendations) == 6
-        assert recommender.recommendations[0]["total"] == 4596.858
+        assert recommender.recommendations[0]["total"] == 4925.205
         assert recommender.recommendations[0]["new_u_value"] == 0.21
 
     def test_uvalue_0_12(self, input_properties):