What should I do if the bathroom downstairs leaks?

The first thing to confirm is the source of water leakage. There are two possibilities.

1. Water pipe leaks,

2. Leakage of waterproof layer,

Generally speaking, the strength of waterproof layer leakage is less than that of water pipe leakage. You can observe the rotation of the water meter without water at home. If it turns badly, it must be that the water pipe is leaking.

If the water pipe leaks, there is nothing we can do. Water pipes must be replaced. If it is on the wall, the workload will be less and the tiles on the ground will be removed. Find out the leaking node and take over again.

If the waterproof layer leaks, considering the economy and convenience, the treatment scheme on the back should be considered first. If it can be stopped, it's best. If you can't stop it, you can only do it on the front. After all, the back waterproof reliability is not high.

Waterproof treatment of back water surface: you judge the solution according to the location of water leakage downstairs; If there is water seepage at the root of the pipeline, you can consider using polyurethane sealant to treat the root of the pipeline as many times as possible, make it into a circle, and enclose it with 10-20cm, depending on your leakage range. If it is not the root of the pipeline, it can be treated with permeable crystalline waterproof coating, mainly because its bonding strength and impermeability are good and it can withstand certain water pressure. The foot of the wall can be made of sealant first, and then waterproof coating. If it still leaks, you can only consider stopping the water from the surface.

Waterproof treatment of waterline: if it is the root of the wall, then treat the root of the wall. After all, the workload is less. If you are in other positions, you can only make big moves. Knock it down and redo it. Alas, there is no way out. After all, everyone is tired of leaking water upstairs and downstairs, which affects harmony. It is better to be cured as soon as possible.