卷材屋面施工中,自由排水的檐口竖向表面常常被沥青污染。原因一般有两个:一是屋面卷材铺贴前,基层冷底子油被雨淋冲刷所致,这种污染的面积比较大;二是铺贴卷材时,操作人员的技术欠佳,沥青胶结材料用量没有掌握好,浇多了,涂刷流淌所致。檐口被污染,影响房屋外部美观。山于沥青胶结材料和檐口的粘结比较牢固,清除 In the construction of coiled roofs, the vertical surface of the free-flowing cornice is often contaminated with asphalt. There are generally two reasons for this: First, before the roofing membrane is laid, the cold base oil on the base layer is washed out by the rain. The area of ​​this pollution is relatively large; second, when laying the coiled material, the operator’s technique is poor, and the asphalt is poor. The amount of cementing material was not well mastered, poured more, and caused by brushing. The mouth was contaminated, affecting the appearance of the exterior of the house. The bond between the asphalt cement and the cornice is firm and clear.