diff --git a/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx b/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx
index ed400f95..e058b918 100644
--- a/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx
+++ b/src/components/floor-plan/modal/placementShape/PlacementShapeSetting.jsx
@@ -457,6 +457,7 @@ export default function PlacementShapeSetting({ id, pos = { x: 50, y: 180 }, pla
                           <button
                             className={`${+currentRoof.roofSizeSet !== 3 && currentRoof?.layout === ROOF_MATERIAL_LAYOUT.PARALLEL && 'act'}`}
                             value={ROOF_MATERIAL_LAYOUT.PARALLEL}
+                            disabled={currentRoof?.roofSizeSet === '3'}
                             onClick={() => handleRoofLayoutChange(ROOF_MATERIAL_LAYOUT.PARALLEL)}
                           >
                             {getMessage('modal.roof.alloc.select.parallel')}
@@ -464,6 +465,7 @@ export default function PlacementShapeSetting({ id, pos = { x: 50, y: 180 }, pla
                           </button>
                           <button
                             className={`${+currentRoof.roofSizeSet !== 3 && currentRoof.layout === ROOF_MATERIAL_LAYOUT.STAIRS && 'act'}`}
+                            disabled={currentRoof?.roofSizeSet === '3'}
                             value={ROOF_MATERIAL_LAYOUT.STAIRS}
                             onClick={() => handleRoofLayoutChange(ROOF_MATERIAL_LAYOUT.STAIRS)}
                           >