diff --git a/src/hooks/common/useRoofFn.js b/src/hooks/common/useRoofFn.js
index 31e31d13..afe1c71e 100644
--- a/src/hooks/common/useRoofFn.js
+++ b/src/hooks/common/useRoofFn.js
@@ -12,8 +12,8 @@ export function useRoofFn() {
     const ratio = window.devicePixelRatio || 1
     const layout = roofMaterial.layout
 
-    let width = roofMaterial.width / 10
-    let height = roofMaterial.length / 10
+    let width = (roofMaterial.width ?? 226) / 10
+    let height = (roofMaterial.length ?? 158) / 10
     let roofStyle = 2
     const inputPatternSize = { width: width, height: height } //임시 사이즈
     const patternSize = { ...inputPatternSize } // 입력된 값을 뒤집기 위해