diff --git a/src/hooks/roofcover/useRoofAllocationSetting.js b/src/hooks/roofcover/useRoofAllocationSetting.js
index 2c914b78..cf0e2282 100644
--- a/src/hooks/roofcover/useRoofAllocationSetting.js
+++ b/src/hooks/roofcover/useRoofAllocationSetting.js
@@ -199,7 +199,7 @@ export function useRoofAllocationSetting(id) {
           roofWidth: item.width === null || item.width === undefined ? 0 : Number(item.width),
           roofHeight: item.length === null || item.length === undefined ? 0 : Number(item.length),
           roofHajebichi: item.hajebichi === null || item.hajebichi === undefined ? 0 : Number(item.hajebichi),
-          roofGap: item.raft === null || item.raft === undefined ? 'HEI_455' : item.raft,
+          roofGap: !item.raft ? item.raftBaseCd : item.raft,
           roofLayout: item.layout === null || item.layout === undefined ? 'P' : item.layout,
           roofPitch: item.pitch === null || item.pitch === undefined ? 4 : Number(item.pitch),
           roofAngle: item.angle === null || item.angle === undefined ? 21.8 : Number(item.angle),