The bathroom is filled with sand, and it is hardened and waterproofed, but it will leak

First you need to determine what is causing the leak in the bathroom:

1. Find a professional hydropower worker to check whether the pipeline is ruptured and causes water leakage, etc., if it is a pipeline problem, it is necessary to repair the pipeline in time to solve the water leakage problem;

2. If there is no problem with the pipeline, then consider that the waterproof layer is not done well and cause water leakage, if the local water leakage is serious, it is recommended to do the waterproofing again, so as to fundamentally solve the problem.

More than 80% of the water leakage in the bathroom is concentrated in the yin and yang corners, pipes, sanitary ware, floor drains and other places, so it is recommended to use kitchen and bathroom waterproof slurry when doing waterproofing, first repair and strengthen these permeable parts, and then do waterproofing as a whole, so that the waterproof effect is better. However, remember to carry out standard construction according to the requirements during construction, so as to ensure a good waterproof effect.

It should not be filled with sand, just do it waterproof.

Filling in cement mortar should do.

The waterproofing is not done well, and if it is redone, it is really manpower and financial resources ,......Sweat.