2. Where there are holes in the wall, chemical grouting or other elastic waterproof materials should be considered according to the specific situation.
3, clean up the surface of the gap, the surface should not have oil, dust and other insulation.
4. The elastic sealing material is embedded in the gap around the window frame.
5. Waterproof treatment is mainly done on the outside of the window. Generally, waterproof putty and waterproof coating are scraped on the wall. Of course, if the foundation waterproof is done in advance, the waterproof effect will be better. If it is indoors, it is generally not waterproof, because if there is water leakage outside, the waterproof effect inside is not ideal. But from the point of view of moisture-proof, it is still beneficial to do waterproof treatment indoors, and glass glue should be used or waterproof outside.