Can you swing the ceiling

tolerable.

If the ceiling is to be swayed, it is recommended to use anti crack mortar for construction. The advantage of anti crack mortar is easy leveling and good anti crack performance.

Crack resistant mortar has a certain waterproof effect, but it is still different from professional waterproof mortar. Crack resistant mortar is generally applied after the waterproof putty of the outer wall. The whole set can prevent the water seepage of the outer wall from being eroded by rain, and will not crack due to prolonged exposure to the sun, wind and rain.

Crack resistant mortar is mainly used to prevent cracking, but it plays a certain waterproof effect, and waterproof mortar mainly plays a waterproof and anti-corrosion effect. In fact, the crack resistant effect is not obvious. Basically, it can be said that there is no crack resistant effect.