diff --git a/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx b/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx
index 518ee43d..ba74f42d 100644
--- a/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx
+++ b/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx
@@ -24,6 +24,7 @@ import { usePlan } from '@/hooks/usePlan'
 import { normalizeDecimal } from '@/util/input-utils'
 import { CalculatorInput } from '@/components/common/input/CalcInput'
 import { usePdfImport } from '@/hooks/pdf-import/usePdfImport'
+import { pdfRoofShapeDescriptorState } from '@/store/outerLineAtom'
 import { logger } from '@/util/logger'
 import { QcastContext } from '@/app/QcastProvider'
 // [LOW-PITCH-WARN 2026-05-06] 저구배 + 특정 기와 사용 시 시공 매뉴얼 안내 alert
@@ -87,6 +88,7 @@ export default function PlacementShapeSetting({ id, pos = { x: 50, y: 180 }, pla
   const { setPolygonLinesActualSize } = usePolygon()
   const { setSelectedMenu } = useCanvasMenu()
   const setCurrentMenu = useSetRecoilState(currentMenuState)
+  const setPdfRoofShapeDescriptor = useSetRecoilState(pdfRoofShapeDescriptorState)
 
   const roofRef = {
     roofCd: useRef(null),
@@ -174,6 +176,7 @@ export default function PlacementShapeSetting({ id, pos = { x: 50, y: 180 }, pla
       formData.append('floorPages', pdfFloorPages.trim())
     }
 
+    setPdfRoofShapeDescriptor(null) // 이전 분석 잔여 제거(cross-run staleness 방지)
     setPdfAnalyzing(true)
     setIsGlobalLoading(true)
     const controller = new AbortController()
@@ -239,6 +242,8 @@ export default function PlacementShapeSetting({ id, pos = { x: 50, y: 180 }, pla
       return false
     }
 
+    setPdfRoofShapeDescriptor(payload.roofShape ?? null) // 지붕형상 자동 선택용(C)
+
     // 외벽선은 항상 미확정(autoFix:false)으로만 그린다 — 확정 여부는 이후 '외벽선 자동 확정' 팝업에서 분기한다.
     const applied = await applyOuterline(payload.outerline, { unit: payload.unit || 'mm', autoFix: false })
     if (!applied) {
diff --git a/src/store/outerLineAtom.js b/src/store/outerLineAtom.js
index b1779609..c660bc71 100644
--- a/src/store/outerLineAtom.js
+++ b/src/store/outerLineAtom.js
@@ -77,3 +77,12 @@ export const autoOuterLineFixState = atom({
   key: 'autoOuterLineFixState',
   default: true,
 })
+
+/**
+ * PDF 분석이 산출한 지붕형상 서술자(RoofShapeDescriptor | null).
+ * analyzePdfAndApply 가 저장 → useRoofShapeSetting 마운트 시 매칭·소비(consume-once).
+ */
+export const pdfRoofShapeDescriptorState = atom({
+  key: 'pdfRoofShapeDescriptorState',
+  default: null,
+})