1, load-bearing wall
As many people know, the load-bearing wall can't be dismantled in the decoration. But what kind of wall is a load-bearing wall, not many people can say clearly. Generally, in a building with brick-concrete structure, all prefabricated walls can't be removed. Brick walls over 24 cm are also load-bearing walls and cannot be demolished. Most of the walls with "empty sound" are non-bearing walls and can be demolished and changed. In addition, it is not allowed for someone to open the door and open the window on the load-bearing wall, which will also damage the load-bearing of the wall.
2, the reinforcement in the wall
If the structure of a house is compared to an adult's body, the steel bars in the wall are human bones and muscles. If the reinforcement is damaged when laying the pipeline, it will affect the bearing capacity of the wall and floor. If there is an earthquake, such walls and floors will easily collapse or break.
3. Beams and columns in the room
These beams and columns are used to support the upper floor. If the upper floor is demolished, it will fall down, so it can't move.
4. Low wall beside the balcony
There is a door and a window on the wall between the room and the balcony. These doors and windows can be removed and modified, but the wall under the window cannot be moved. This section of the wall is called the "counterweight wall", which plays the role of supporting the balcony like a heavy object. Demolishing this wall will reduce the bearing capacity of the balcony and lead to the balcony falling.
5. "Three Prevention" or "Five Prevention" doors
The doorframes of these doors are embedded in concrete. If they are dismantled and modified, the building structure will be damaged and the safety factor will be reduced. But also destroyed the building structure at the entrance and increased the difficulty of reinstalling new doors.
6, bathroom and kitchen waterproof layer
These places have waterproof layers underground. If they are destroyed, the downstairs will become "water curtain cave". So when you replace the floor material, you must be careful not to destroy the waterproof layer. If it is rebuilt after being destroyed, it is necessary to do a "24-hour water seepage experiment", that is, fill the kitchen or bathroom with water, and it will be qualified if it does not leak for 24 hours.
7. Toilet squatting pan
Some old houses are still using old squatting pans, so you must be careful if you want to replace them with toilets. Because squat toilets are usually pushed forward and then pushed back, replacing the toilet means replacing the sewer pipe. This construction is difficult, and the original waterproof layer must be destroyed. If it is not installed properly, either the downstairs leaks or the toilet doesn't get water.
8. Heating and gas pipes
The installation and removal of gas pipelines must be carried out by professional construction personnel of the gas company. The decoration company cannot "do it for you" and cannot set water meters, electricity meters and gas meters during decoration. You should also be careful about heating and heating pipes, because the location of indoor heating directly affects the indoor temperature in winter. If it is not dismantled properly, it will either affect the heating or the heating will run away.
9. Original steel window
Some tenants changed the aluminum windows because the original steel windows were not good-looking. At present, some aluminum alloy windows are far less sturdy than steel windows, because a few decoration companies use small-sized profiles in order to be cheap or simply shoddy. The use of this aluminum alloy window is easy to fall off, especially in high-rise buildings.