diff --git a/src/hooks/roofcover/useRoofAllocationSetting.js b/src/hooks/roofcover/useRoofAllocationSetting.js
index 05a76e9b..ec2d2661 100644
--- a/src/hooks/roofcover/useRoofAllocationSetting.js
+++ b/src/hooks/roofcover/useRoofAllocationSetting.js
@@ -83,7 +83,13 @@ export function useRoofAllocationSetting(id) {
     }
     setCurrentRoofList([
       ...currentRoofList,
-      { ...currentRoofMaterial, selected: false, id: currentRoofMaterial.roofMatlCd, name: currentRoofMaterial.roofMatlNm },
+      {
+        ...currentRoofMaterial,
+        selected: false,
+        id: currentRoofMaterial.roofMatlCd,
+        name: currentRoofMaterial.roofMatlNm,
+        index: currentRoofList.length,
+      },
     ])
   }