What is the cause of water leakage in the bathroom and damage to the floor?

There are two scenarios for you:

First, the wall seepage, according to the probability of water seepage you said.

Second, the water pipe leakage, your may be the water pipe leakage, the water seepage is not to step on the floor to come out of the water, but it will be more wet, look for the previous help you to do the decoration first, find out what is the cause, and then make the corresponding remedial measures.

If it helps you, please adopt it in time, thank you.

In this case, it is recommended to knock it all out and do it again. Because you have water seepage on the ground and walls. When the water pipe is newly made, the water pipe is first re-arranged, and then the wall and floor are smoothed with cement, and then the entire waterproof layer is made.

After the waterproof layer is dry, the ground should be tested for more than 24 hours. Finish with tiles.

You need to find a master to do a pressure sealing experiment for your hot and cold water pipes, that is, to check whether there is a broken water pipe, or it is possible that your bathroom waterproof is not done, if the waterproof is not done well, it will be troublesome, you need to rework to the waterproof place and then do it again, hurry up.

If this is the case, it is not that your waterproofing is not done well, it may be a problem with your floor drainage, and your current water leakage may be leaking on the waterproof layer.

Only the floor adjacent to the bathroom has this phenomenon, which means that the waterproofing of the bathroom wall is not done, and the bathroom wall is a shower?

Is it the floor next to the bathroom door or the floor outside the wall?