Cause 1: defects in structural design of aluminum doors and windows or selection of profiles 

　　原因2:领导风面,雨水清洗表面,防止渗漏,防止漏考虑不足,过分强调采光和通风的需要,”波窗口,落地窗,通过一个窗口”等墙体改变门窗大量出现,不注意建筑防水、导致其雨水泄漏越来越突出的问题; 

　　Cause 2: lead the wind surface and rain water to clean the surface, prevent leakage, and pay too much attention to the needs of lighting and ventilation. "Wave window, floor window, through a window" and other walls change the appearance of doors and windows, do not pay attention to building waterproof, resulting in the more prominent problem of rain water leakage;

 　　原因三:设计文件不完整或没有进行结构设计，导致锁点不足或铝门窗材料结构强度和挠度不能满足要求，导致塑性变形在正常风压、拉伸或破坏及雨水渗漏;

 　　Cause 3: incomplete design documents or no structural design, resulting in insufficient locking points or the structural strength and deflection of aluminum door and window materials can not meet the requirements, resulting in plastic deformation under normal wind pressure, tension or damage, and rainwater leakage; 　

  　原因四:对型材的选择简单适用，导致型材不匹配或装配松动或截面水堵高度不够，造成直接渗漏;在外观上过分注重线条装饰，造成门窗型材接缝、墙角过多而导致堵塞缺陷的拼缝。

 　　Reason 4: the selection of profiles is simple and applicable, resulting in profile mismatch or loose assembly or insufficient section water blocking height, resulting in direct leakage; pay too much attention to line decoration in the appearance, resulting in too many joints of door and window profiles, wall corners, resulting in blocking defects. 

　　所以,我们也可以发现这种情况的原因,因为我们购买的产品质量不好,设计不合理,就会出现这种情况,所以建议:买书的门的时候,可以选择一些大、口碑良好的济南卷帘门制造商,质量可以保证,售后服务也很好!

 　　Therefore, we can also find the reasons for this situation, because the quality of the products we buy is not good and the design is not reasonable, this situation will occur, so it is suggested that: when buying the book door, you can choose some large and well-known manufacturers of Jinan roller shutter door, the quality can be guaranteed, and the after-sales service is also very good!