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1、安裝之前的電梯門套線由于施工要求的需要則需要進行正面甚至五六面的防護工程，以此來防止電梯門套線在使用當中由于地下水或者是水泥中的水份滲入電梯門套線本身的結構當中去，再加上水泥中堿性金屬離子的滲入，造成白華。

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、在選擇電梯門套線的填縫劑時，應當選擇適合該電梯門套線的填縫劑材料，并且在操作施工中以正確的方法來進行施工，以此來防止填縫之處白華的產生。
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、用于電梯門套線鋪設中的水泥砂漿，則需要使用一些低水灰配比的水泥砂漿，并需要添加減水劑，以此來降低水泥中過量的水份。
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、多選用一些無污染的骨材，應辟免使用海砂，因為海砂之中的鈣鎂鈉等金屬離子較為瘋狂，以此來降低骨材之中的金屬離子來源，并且要求在水泥砂漿中添加防水劑，此方法可以避免金屬離子成份被大量的水分溶解從而滲透進電梯門套線之中。
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.