My family has lived for 3 years, recently downstairs bathroom door outside the wall soaked in water,

You'll definitely have to find property maintenance.

If it is under warranty, it should be the developer who is responsible for maintenance. >>>More

Be able to sue because the owner has carried out the act of demolishing the load-bearing wall, which has caused you hidden dangers and potential harm.

If you use a polymer roll to make waterproofing, it will basically leak after two or three years, and the bathroom needs to be painted.

It is recommended that you go downstairs to see the condition of the roof, it is likely to be the reason for your home, the ground is dry can not explain the problem, there is about 50mm or so building gap between the ground tile and the structural floor, which includes about 20mm cement mortar protective layer above the waterproof layer, about 30mm bonding layer, this value may be more if the building quality is poor, now for the anti-floor tile drum more use dry hard ash paving, the bathroom belongs to the water room, buried in the ground pipes such as water supply pipes, drainage pipes, The floor heating pipe appears in the trachoma, the joint layer around the toilet outlet (the section of the façade between the tile and the floor) is not painted with waterproof coating film, and the surface water penetrates through the tile, etc., which will cause the protective layer, the combined layer of water and even the saturated state, and the water is full of overflow and the crack will be drilled, and there are several situations in serious cases: 1. The waterproof layer is lower than the height of the finished surface of the floor tile and there is a leakage point, and the water has not returned to the surface of the floor tile through the leakage point to the downstairs, 2. The waterproof layer has no leakage point, that is, the effective waterproof is higher than the ground tile, If there is no effective water-stopping barrier at the door, the water will penetrate into the living room or other rooms adjacent to the bathroom through the door, and the ground with wooden floors will soon be seen, and you can check the abnormal wall above the baseboard around the door. Therefore, you can not judge whether there is water leakage according to whether the ground is dry or not, but also need to carefully observe and analyze the cause, if the leakage of the toilet drain belongs to the solution, use a blade to remove the glass glue at the root of the toilet and remove the toilet, and re-brush the pipe wall with waterproof coating film.

If there is a problem with waterproofing, it is OK to deal with the doorway.