Reasons for hollowing and foaming of the putty layer:

①基層處理不當(dāng)，如有浮塵、疏松或光滑等，使膩?zhàn)訉优c基層接觸不夠緊密，形成夾層；

① Improper treatment of the base layer, such as floating dust, looseness, or smoothness, results in insufficient contact between the putty layer and the base layer, forming an interlayer;

②基層與膩?zhàn)訉又g存在致密層，如用界面劑不加水稀釋進(jìn)行界面處理，使空氣無法正常向基層擴(kuò)散。

② There is a dense layer between the base layer and the putty layer. If interface agent is used without water dilution for interface treatment, it will prevent air from spreading to the base layer normally.

解決辦法：

Solution:

如果墻面氣泡或空鼓較小，可以通過打磨的方式處理后再用墻錮進(jìn)行界面處理，然后批刮； 如果墻面空鼓較大，已經(jīng)造成大面積脫落，則建議全部鏟除后用墻錮系列進(jìn)行處理，然后批刮。

If the bubbles or hollows on the wall are small, they can be polished and then treated with wall bonding for interface treatment, and then scraped in batches; If there is a large hollowing on the wall, which has caused a large area of detachment, it is recommended to completely remove it and then use the Wall Gu series for treatment, and then batch scrape it.