What should be used to fill the small gap in the lower half centimeter of aluminum alloy doors and windows?

1. If the gap between the window frame and the wall is less than 5cm after installation, the gap can be filled with styrofoam and then painted with waterproof glue, which can not only fill the gap, but also ensure no water seepage;

2. If the gap is large, you can choose to fill the gap with bricks or apply cement slurry, so as to ensure the firmness of the gap between the wall and the window frame. This is usually a remedial measure after installation. It is best to grasp the size when measuring, and try to control the gap within 1-2 cm.

3. Fill the door and window with rock wool, smooth the outer layer with cement, and then paste wallpaper or paint. This treatment is because the outer layer is smoothed with cement. After a long time, cracks will still appear in the cement at the edge of doors and windows due to displacement changes;

4, between the doors and windows and the wall first filled with polyurethane foam glue, external use silicone sealants seal. This method solves the crack problem. However, color matching should be paid attention to when using silicone adhesive.