diff --git a/src/main/resources/mappers/estimate/estimateMapper.xml b/src/main/resources/mappers/estimate/estimateMapper.xml
index 18c0995e..bac07042 100644
--- a/src/main/resources/mappers/estimate/estimateMapper.xml
+++ b/src/main/resources/mappers/estimate/estimateMapper.xml
@@ -428,7 +428,7 @@
 
     <select id="selectEstimateRoofList" parameterType="com.interplug.qcast.biz.estimate.dto.EstimateRequest" resultType="com.interplug.qcast.biz.estimate.dto.RoofResponse">
         /* sqlid : com.interplug.qcast.biz.estimate.selectEstimateRoofList */
-        SELECT
+        SELECT DISTINCT
               P.OBJECT_NO
             , P.PLAN_NO
             , CASE WHEN ISNUMERIC(P.SETUP_HEIGHT) = 1 THEN CAST(CONVERT(FLOAT, P.SETUP_HEIGHT) AS INT)  ELSE 0 END AS SETUP_HEIGHT