2. Secondly, for large-area gypsum board ceiling, gypsum edges should be staggered to disperse stress and avoid cracks.
3. Then the gap between adjacent gypsum boards is convenient for cutting at eight positions, and the joint is 3~5mm, which is convenient for filling anti-crack materials in the later stage.
4. If the final wet space adopts gypsum board ceiling, waterproof gypsum board should be adopted. Gypsum board adopts self-tapping fixation. In order to prevent the gypsum board from cracking because it is too close to the edge of gypsum board, the distance between the self-tapping nail and the edge of gypsum board is15 mm 5 mm, and the self-tapping nail should be slightly lower than the board surface, so as to avoid bulging and affect the later latex paint coating. When gypsum board is fixed, the splicing point should be fixed on the keel, and cantilever is prohibited. There should be no cracks, fractures, breakage and other problems on the surface of the installed gypsum board. If double gypsum boards are installed on the ceiling, the joints of the upper and lower gypsum boards should be staggered, and the stress should not be dispersed on the same keel to reduce the crack problem caused by thermal expansion and cold contraction.