In the process of construction, it is mainly to prevent the water-stop through-wall screw from breaking, leading to mold explosion. The appearance of water stop through-wall screws should be checked in advance to ensure that the threads are lubricated and free of impurities such as rust. Because the through-wall screws can be used many times, if the casing is used, the appearance can be guaranteed to be intact. If casing is not used, it is easy to be operated by concrete sand and gravel. Therefore, before construction, it is necessary to check whether the appearance is newly purchased or used many times to avoid unnecessary security risks.
Secondly, the water-stop through-wall screw should be used in a clean environment to minimize the accumulation of impurities. Because such a small detail may affect the later construction effect. Before construction, special attention should be paid to the pressure test of the factory's through-wall screws. In order to prevent the through-wall screws from breaking during concrete pouring, this test is another evaluation by the manufacturers of through-wall screws. After all, manufacturers of through-wall screws have to go through tension before shipment.
Finally, after the water-stop through-wall screw is built, it is necessary to check whether all the nuts are tightened and whether the nuts are matched with the screw, and check them one by one to prevent the nuts from flying off and causing mold explosion. There are also many such problems in the construction site. The construction friends who have learned lessons have put an end to such problems and are determined not to repeat such incidents. So be very careful in the last link of nuts. I hope I can help you. Thank you.