1、安装之前的电梯门套线由于施工要求的需要则需要进行正面甚至五六面的防护工程，以此来防止电梯门套线在使用当中由于地下水或者是水泥中的水份渗入电梯门套线本身的结构当中去，再加上水泥中碱性金属离子的渗入，造成白华。

1, prior to installation of the elevator door pocket line due to the requirement of the construction of the need positive even five or six surface protection engineering, in order to prevent the elevator door pocket line in use due to groundwater or the structure of the cement water filters into the elevator door pocket line itself, coupled with the infiltration of the alkaline metal ion in cement, caused by China.

2、在选择电梯门套线的填缝剂时，应当选择适合该电梯门套线的填缝剂材料，并且在操作施工中以正确的方法来进行施工，以此来防止填缝之处白华的产生。
2, in the choice of elevator door jamb filling agent shall for the elevator door jamb filling material selection, and in the construction operation to correct method to carry out the construction, in order to prevent the filling of white China.
3、用于电梯门套线铺设中的水泥砂浆，则需要使用一些低水灰配比的水泥砂浆，并需要添加減水剂，以此来降低水泥中过量的水份。
3, used for elevator door pocket line laying in the cement mortar, you need to use some low water cement ratio of cement mortar, and the need to add water reducing agent, in order to reduce excess water from the cement.
4、多选用一些无污染的骨材，应辟免使用海砂，因为海砂之中的钙镁钠等金属离子较为疯狂，以此来降低骨材之中的金属离子来源，并且要求在水泥砂浆中添加防水剂，此方法可以避免金属离子成份被大量的水分溶解从而渗透进电梯门套线之中。
4, choose some non polluting aggregate, should be the provision of free use of sea sand, because sea sand, calcium, magnesium, sodium and other metal ions is crazy, in order to reduce the aggregate of metal ion source, and added in the cement mortar waterproof agent. This method can avoid metal ion composition is a lot of water dissolve and penetrate into the elevator door pocket line among.