The bathroom seeps water, and the living room wall is damp, looking for the property and saying that

The developer should be approached, and the developer is directly responsible.

Many people may have a misunderstanding, thinking that the waterproof layer will only leak downstairs if there is a problem, but in fact it is not the case, the waterproof layer is divided into horizontal and waterproof layer and the vertical waterproof layer on the side, the horizontal waterproof layer leaks to the downstairs if there is a problem, and the vertical waterproof layer on the side leaks to their own home if there is a problem. Water leaking into the corner of the outside of your bathroom or the bathroom door is first sure that the vertical waterproof layer on the side is broken somewhere, otherwise no matter how much water can only come up from your tile surface. In fact, the damp marks we see in the corner of the bathroom or the door of the bathroom are not vertically leaked in the past, theoretically speaking, as long as the waterproof layer is damaged somewhere, the open water in the bathroom penetrates below the tile surface from the corner, tile surface and joints or any other possible place, and is concentrated in the mortar layer, then the mortar layer is equivalent to becoming a water layer, and then concentrated in the waterproof layer where the damage leaks downstairs.

Note: The damp and mildew of about 50 cm from the ground to the outside wall of the bathroom is caused by water seepage on the bathroom floor, not the wall water seepage.

Conclusion: The vast majority of the bathroom leaks to their own home, it is useless to treat the whole surface, only to ensure that the entire ground is completely free of water can penetrate into the mortar layer below the surface of the tile, there will be no water seepage to the damage of the waterproof layer, so that the problem of water leakage is solved.

When you decorate yourself, the concealed project is not in place, scrape the wall skin, use waterproof putty, it is useless to find anyone, and the way to do it is to redo the bathroom waterproof, so that it is meter high. Think for yourself!

It's useless to look for it, because the interior has been renovated, and the developer doesn't care that it should be waterproof when decorating itself! During the construction, it was only simple and waterproof, only as high as the baseboard, and I had to do it about a meter!