diff --git a/src/util/skeleton-utils.js b/src/util/skeleton-utils.js
index 8a25ae80..8c41c9c7 100644
--- a/src/util/skeleton-utils.js
+++ b/src/util/skeleton-utils.js
@@ -473,6 +473,9 @@ export const skeletonBuilder = (roofId, canvas, textMode) => {
     roofLineContactPoints = movingLineFromSkeleton(roofId, canvas)
   }
 
+  // changRoofLinePoints 좌표를 roof.skeletonPoints에 저장 (원본 roof.points는 유지)
+  roof.skeletonPoints = changRoofLinePoints.map(p => ({ x: p.x, y: p.y }))
+
   console.log('points:', changRoofLinePoints)
   const geoJSONPolygon = toGeoJSON(changRoofLinePoints)
 
@@ -1766,10 +1769,28 @@ function processEavesEdge(roofId, canvas, skeleton, edgeResult, skeletonLines) {
   }
 
   let eavesLines = []
+  // 확장된 외곽선 판별용
+  const skPts = roof.skeletonPoints || []
+  const isSkeletonOuterEdge = (p1, p2, tolerance = 0.5) => {
+    for (let si = 0; si < skPts.length; si++) {
+      const sp1 = skPts[si]
+      const sp2 = skPts[(si + 1) % skPts.length]
+      if ((Math.abs(p1.x - sp1.x) < tolerance && Math.abs(p1.y - sp1.y) < tolerance &&
+           Math.abs(p2.x - sp2.x) < tolerance && Math.abs(p2.y - sp2.y) < tolerance) ||
+          (Math.abs(p1.x - sp2.x) < tolerance && Math.abs(p1.y - sp2.y) < tolerance &&
+           Math.abs(p2.x - sp1.x) < tolerance && Math.abs(p2.y - sp1.y) < tolerance)) {
+        return true
+      }
+    }
+    return false
+  }
+
   for (let i = 0; i < polygonPoints.length; i++) {
     const p1 = polygonPoints[i];
     const p2 = polygonPoints[(i + 1) % polygonPoints.length];
 
+    // 확장된 외곽선에 해당하는 edge는 스킵
+    if (skPts.length > 0 && isSkeletonOuterEdge(p1, p2)) continue
 
     // 지붕 경계선과 교차 확인 및 클리핑
     const clippedLine = clipLineToRoofBoundary(p1, p2, roof.lines, roof.moveSelectLine);