Introduction to the renovation of second-hand houses in Shanghai
First of all, we must reform the circuit and increase the sockets.
Second-hand houses generally have simple circuit distribution, aging wires, illegal wiring and other phenomena, which can no longer meet the electricity demand of modern families. When decorating, they must be completely transformed and rewired. If the original lines are found to be aluminum wires, they must all be replaced with copper wires with a cross section of 2.5 square millimeters. For the lines of high-power electrical appliances such as air conditioners, lines with a cross section of 4 square millimeters should be set separately, and PVC insulated protective tubes must be used when burying the lines.
Important note:
The new national standard stipulates that the number of fixed sockets in houses should not be less than 12, but there are still many existing sockets in second-hand houses that cannot meet this standard. If a large number of mobile sockets are used, when the current load increases, the mobile sockets will produce abnormal high temperature due to poor contact, laying a hidden danger for electric shock and electrical fire accidents.
Second, it is essential to replace the aging water pipe for water storage test.
The original waterway pipelines of second-hand houses often have many unreasonable layouts. When decorating, you must thoroughly check the original waterway to see if it is rusty and aging. If the obsolete galvanized pipes are used in the original pipelines, they must all be replaced with copper pipes, aluminum-plastic composite pipes or PP-R pipes during reconstruction.
Important note:
Before the renovation of second-hand houses, it is necessary to carry out 24-48 hours of water storage and leak detection experiments on bathrooms and kitchens to check how the original waterproof works are done. If there is no water leakage, it proves that the waterproof treatment is done well; If there is water leakage, be sure to waterproof it again. After waterproofing, when the ground is completely dry, tile will be laid for overall decoration. Moreover, when the toilet is changed from squatting to sitting, the waterproof treatment of the lower outlet of the toilet must be done well. When designing and decorating the top of the toilet, we should pay attention to the convenience of disassembly, which is conducive to future inspection and maintenance. At the same time, it should be noted that no dead ends can be left after construction.
Third, old doors and windows should be torn down and redone.
Aging of doors and windows is also a prominent problem of second-hand housing. But if the material is solid and you like its style, you can look brand-new by repainting it. But if the following problems occur, it must be dismantled and redone. The main problem is to see if there is peeling and deformation of wooden doors and windows. If so, it means that the characteristics of the wood itself have changed and must be replaced.
Important note: the paint film on the surface of steel doors and windows falls off, and the main body is corroded or cracked, which is not only unsafe, but also difficult to restore. In order not to affect the use effect, experts suggest that it should also be demolished and redone.
Four, take cover engineering apart again strict inspection to eliminate hidden dangers.
At present, a large part of the quality problems in home decoration are caused by improper construction of "concealed works". What is a "concealed project"? In the process of construction technology sequence, after the completion of the previous step, the part that is covered by the next step and cannot be inspected is called "concealed work". Therefore, in the decoration of second-hand houses, special attention should be paid to "concealed works". For example, whether the pipes, lines and equipment of various facilities such as water supply, air conditioning and ventilation in the ceiling have been tested for tightness, electrical insulation and resistance, whether the connection is firm, whether the joint practices meet the requirements, and whether the flammable materials have been treated with fire prevention and flame retardant, etc., all belong to the scope of "concealed engineering" and cannot be inspected after the first installation.
Important note:
When the old house is renovated, it is a good opportunity to reopen these parts to eliminate hidden dangers. The owner must strictly check and remove the "hidden works" left over from the past.
Five, demolition and decoration should also pay attention to two points.
1. When smashing wall bricks and floor tiles, avoid debris blocking the sewer.
2, waterproof handle, waterway with elbow as little as possible, to avoid poor or blocked waterway.
Important note:
Use as few boards as possible. Most wood products contain formaldehyde, which affects health. In addition, wood will be deformed because of wet weather, and the manual cost of wood products is also high.
Six, walls, floors and ceilings must be transformed on three sides.
In the process of decoration, it is also very important to decorate the walls, floors and ceilings of second-hand houses. It is best to ask professionals to conduct on-the-spot investigation on the house to see if there are obvious cracks, flatness, shedding and sand. If these situations exist, it is necessary to repair them, including removing oil stains from the wall surface, powdering the wall paint, and repairing the base, cracks and holes with cement mortar.
Important note:
An important step in the renovation of second-hand houses is thorough disinfection. It can be sprayed with 3% Lysol water, 1%-3% bleaching powder water or 3% peracetic acid solution, and then the doors and windows are closed for one hour.
As mentioned above, when decorating second-hand houses in Shanghai, we must consider the actual situation and successfully complete the decoration of second-hand houses, so as to ensure that we can successfully complete the decoration of second-hand houses and will not bring trouble and harm to ourselves when decorating second-hand houses. Whether it is second-hand house decoration or first-hand house decoration, you need to find a good decoration company to ensure that you will decorate your second-hand house well without any trouble.
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