How to solve the cracks between the balcony and the main wall

Your situation shows that your home should be on the top floor. Then just make another layer of waterproofing directly outside the balcony ceiling. (If you are a downstairs resident, it is impossible to leak water from the seam you said).

There are two main problems that are prone to occur in gypsum board ceilings: The first situation is that about half a year after the completion of the ceiling, cracks begin to appear at the joints of the gypsum board. The solution is to ensure that the gypsum board is fixed in a stress-free state when the gypsum board is suspended. >>>More

Call a branded plugging unit to help you solve it. Although it is a little more expensive, it will be done once and for all.

Here's how to fix it:

1. Laying direction, transverse and longitudinal fixation, the strength performance and deformation of gypsum board are determined according to the direction, the longitudinal performance of the board is superior to the transverse, so the ceiling is not allowed to be parallel to the longitudinal and overlying keel, should be perpendicular to the keel, gypsum board must be installed in a stress-free state, the installation of the ceiling board is temporarily supported by wooden support, and the board is pressed with the skeleton, the support can be revoked only after the screw is fixed, and when the fixed plate is installed, it is fixed from the middle of the board to the four sides, and no more points are allowed to work at the same time. >>>More

If the flush does not leak to the outside, you can use Sanhe ash to fill the bottom of the toilet bowl and fix it, and use it after drying