First of all, the aging water pipes must be replaced. The original waterway pipelines of second-hand houses often have many unreasonable layouts. When decorating, we must thoroughly check the original waterway to see if it is corroded and aging. If the obsolete galvanized pipe is used in the original pipeline, it must be completely replaced with copper pipe, aluminum-plastic composite pipe or PP-R pipe during construction. For example, before decorating the bathroom, block the floor drain and put in water about 5 cm deep for testing. If there is water leakage, be sure to redo the waterproof work; At the same time, it should be noted that no dead ends can be left after construction.
Second, the circuit must be rebuilt. Second-hand houses generally have simple circuit distribution, aging wires and illegal wiring. , can no longer meet the electricity demand of modern families, and must be completely transformed and rewired when decorating. If it is found that the original lines use 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 conduits must be used when burying the lines. In addition, the new national standard stipulates that the number of fixed sockets in residential buildings 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.
Third, the quality problems in the current home decoration of the "concealed project" demolition are largely caused by improper construction of the "concealed project". 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. The insiders suggest that it is a good opportunity to reopen these parts when the old houses are rebuilt. The owners must strictly check and dispose of the "hidden projects" left over from the past.
Fourth, the transformation of the three "faces" is very important. In the decoration, the renovation of the wall, floor and ceiling of the second-hand house is the most easily overlooked. Experts suggest that it is best to ask professionals to conduct on-the-spot investigation of the house to see if there are obvious cracks, flatness, falling off, sand and so on. 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. Then you can choose diatom mud with strong plasticity and superior environmental protection function for wall decoration. Diatom mud can be positioned according to the overall atmosphere and style of home, providing users with satisfactory colors and patterns, and can also make use of its unique functions to create an active, healthy and appropriate humidity home environment. During construction, attention should be paid to the cleanliness of the air at the site, dust prevention and no sundries on the tools.
Verb (abbreviation of verb) door and window renewal It is also a prominent problem of second-hand housing to carefully consider the aging of doors and windows. 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. In addition, 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 to its original state. In order not to affect the use effect, experts suggest that it should also be demolished and redone.
Six, in the demolition of old tiles, but also pay attention to three points: 1. When smashing wall bricks and floor tiles, avoid debris blocking the sewer; 2. Deal with waterproofing, and use elbows as little as possible to avoid poor water or blockage; 3. 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. Seven, second-hand housing should be thoroughly disinfected and decorated. There is an important step in second-hand housing, which is to thoroughly disinfect it. It can be sprayed with 3% Lysol water, 1%-3% bleaching powder water or 3% peracetic acid solution. Close doors and windows after spraying 1 hour.