[China Aluminum Network] The rainwater leakage of aluminum alloy doors and windows in construction projects is more common and difficult to cure. It has a great influence on the quality of construction projects, and the economic losses caused are even more unpredictable. Following the large-scale development of China’s civil residential development, residential buildings are becoming more and more high-level, facing the need for architectural lighting and aesthetics, and the monolithic areas of doors and windows are becoming larger and more walled, causing the problem of rain leakage to become increasingly prominent. At the same time, the rainwater leakage phenomenon of aluminum doors and windows is also widespread and similar in other materials and doors, and some are even more severe. Therefore, it is necessary to analyze and deal with the causes of rain leakage from aluminum doors and windows. This not only has the same guiding significance for solving the problem of rain leakage of aluminum doors and windows, but also for other types of doors and windows. The main causes of leakage of aluminum doors and windows can be divided into four major categories. One: In the design process, there are defects in the structure of the doors and windows themselves. Second, the quality of the doors and windows cannot be satisfied during the process. Third, the materials and accessories are caused by the disagreement of the grid. Fourth, the sealing of the joint parts of the wall of the hole is caused by improper sealing. Leakage caused by one or four of these four categories is more harmful and difficult to handle. . In addition, there are defects in the building structure itself, which causes the phenomenon of rain leakage at the joints between the doors and windows and the wall of the cavern. However, this is not a leakage problem for doors and windows. A. The design of the waterproof structure of aluminum doors and windows is unfair, the level of waterproof seal is not enough, and the drainage channels in the aluminum doors and windows structure cavity are not formed. When the rainwater enters the aluminum door and window cavity and enters the room easily due to the difference of the indoor and outdoor wind pressure, the rainwater entering the aluminum door and window cavity can not be smoothly exhausted through the aluminum door and window drainage system and remain in the door and window. Water leaks. B. The structural strength and rigidity of the aluminum doors and windows fail to meet the requirements of the wind pressure performance of the location of the aluminum doors and windows, resulting in the aluminum rods, windows, the stress rods, hardware fittings, seals and bonding materials under normal wind loads. Severe plastic deformation, cracking or damage, etc., resulting in failure of the door and window body seals and rain leakage. The reason is that the product fails to accurately calculate and design the strength according to the specifications, and it does not pass the physical performance test of wind pressure before the production installation. C. In the process of architectural design, improper selection of aluminum alloy doors and windows is also one of the causes of rainwater leakage from doors and windows. It is common to use ordinary sliding door aluminum doors and windows for the facades of high-rise buildings or areas where there is a large amount of rain, and it is not used directly in the structure of aluminum doors and windows or in the structure of the building to take necessary waterproof measures. D, aluminum doors and windows installed in the field, the assembly size control is not good, resulting in mutual lap seal the position of the misaligned or overlap size is insufficient, or due to pressure enough and there is a gap, used to secure the door window frame fastening screw does not close Sealed by glue, and the surface of sealing part is not cleaned when sealed with sealant. E, aluminum doors and windows used in the sealing material is too bad, such as the rubber is too hard, anti-aging time is short, the sealant is out of date use or counterfeit fake rubber, anti-shift ability is poor, easy to crack and so on. F, aluminum doors and windows processing accuracy can not meet the quality requirements, with the gap is too large, the need to assemble after the adhesive assembly without direct sealing material assembly, causing rain through the various assembly gaps penetrate the doors and windows and the main structure.