Relative to the new house decoration, second-hand housing decoration, old house decoration, old house decoration is a system project, no matter there is no small difference in design and construction. If you want to optimize, it is indeed a "learning." For this reason, the reporter interviewed senior consultants and decoration experts who had worked hard in the decoration industry for more than a decade. They summarized some of the problems encountered during the renovation of the old house, and put forward some secondary housing renovations, old house renovations, and old houses. The "eight optimization" principle of the decoration is for the reference of friends who need to do second-hand house decoration, old house decoration, and old house decoration. First, structural optimization 1, before the second-hand housing renovation, the old house renovation according to the actual situation of the house to carry out some structural layout optimization, the waste of space fully utilized; 2. Dismantle and renovate some partition walls (non-bearing walls), wall cabinets, top cabinets, etc. to increase and improve lighting and usage. Second, waterway optimization 1, according to the shower, wash basins, toilets, washing machines, vegetable sinks, mop pool, water purifiers, electric water heaters, gas water heaters to increase the location of some inlet, outlet, drain outlet. 2. Replace the original old pipeline with a PPR pipe (preferably a PPR composite copper pipe) and replace it with a dark pipe. 3, the old valve is always closed, not only beautiful and not easy to use, it is best to replace the vacuum copper ball valve with reliable quality. Third, circuit optimization 1. Many buildings in the 1990s had a circuit mixed with lighting and sockets. The wire was an aluminum core wire or a 1.5 square copper wire. During the process of use, once several electrical appliances were opened or one of the appliances was leaking, the main gate was open. Jumped, causing other appliances can not be used normally, in addition to the old room of the circuit are not grounded protection, simply can not effectively prevent the aging of the circuit or short circuit after the accident caused by leakage of the human body, which is even more necessary to completely transform! ! ! 2. Some of the old building's high-voltage systems The government had conducted capacity expansion at the end of the last century, but the capacity expansion is generally limited to air-conditioning circuits and can basically guarantee its use. However, most of these capacity-added cables are cable trunking or Walk directly on the outside of the wall with a three-phase sheathing line, which seriously affects the overall aesthetic appearance of the wall surface. These lines must also be transformed into dark lines. 3, these old houses; old house distribution box settings are generally older, the circuit is too simple, and the power ratio of each circuit is not reasonable, need to be based on the power of all the power equipment, planning a safe and reasonable Circuit design. In an ideal state, the switch box should be five switch circuits: master switch, lighting, common socket, air conditioner, kitchen and bathroom socket. If there is a fast-fired water heater, it is necessary to add a separate circuit of 6 square copper wire. 4. As more and more household appliances and lamps are used, there are many places where switches and sockets need to be placed. Before the renovation, we must do a good job of cabling work in advance, which places need to be placed in the future what electrical appliances, planning in advance, and the old house reserved switches and sockets are generally not enough. In general, a room must have at least 3 outlets. There should be no fewer than 15 sockets in a two-bedroom residential building and no less than 8 switches. The switch height of the same room should be the same. Generally, the lower part of the switch is 1.4 meters away from the ground, and the lower part of the outlet is 0.3 meters away from the ground. All the switches should be set in a convenient location. Fourth, weak electricity optimization 1. Cables and telephone lines must be rewired according to actual needs. 2. Add satellite TV and connect with LAN, because many satellite TV programs need to be decrypted through the Internet. 3, network television is the future trend, so each TV port to add a network interface, through the router in the weak box to allocate. 4, increase the household weak power distribution box, modems, routers, TV distributors, etc. need power and the corresponding space, there is a special weak power distribution box will be a lot easier. Fifth, wall optimization 1. Eliminated the original putty that is not environmentally friendly and resistant to water, and replaced it with a more environmentally friendly and reliable US Nest easy to level 800 water-resistant and anti-cracking putty. 2. For the original local hollow drum cracking on the foundation of the wall and floor slab, it must be removed to a firm base, and then the kraft paper tape and the glass fiber mesh cloth should be cracked. 3. Many of the plastering layers of the brick-concrete buildings in the 1990s were mostly paper reinforced lime, and the interior was a mixed mortar with very low bond strength. This type of wall was particularly prone to large areas. Drums and cracking, cracking putty must be done beforehand. 4. In the case of serious cracking of the wall surface of inner thermal insulation and non-load-bearing walls, it is necessary to carry out anti-cracking treatment on paper plasterboard with a thickness of 9.5mm. Six, door and window optimization 1, replace the original non-heat insulation is not soundproof doors and windows, such as the use of hollow glass flat open (hanging) doors and windows to replace the old sliding doors and windows, and conditions to replace the more environmentally friendly energy-saving aluminum doors and windows broken bridge. 2. Replace the door without insulation and sound insulation with the three doors of insulation, sound insulation, fire prevention and ventilation. Replace non-insulated interior doors with soundproof wooden doors with seal strips. Seven, thermal optimization 1. Some old house balconies and exterior walls have not been insulated or insulated. 2. Use heat-insulating materials such as light bricks, extruded boards, and heat-preserving rock wool, which are materials with superior heat and heat insulation properties, at locations where insulation performance is weak. Eight, waterproof optimization 1. The old house's bathroom and kitchen waterproofing layers have been aging for a long time and the anti-leakage effect has been greatly reduced. 2. It can use the high-performance polymer Orient Yuhong waterproof mortar for waterproof treatment. 3. Water shall be filled on the ground after completion of waterproofing, and a water-sealing test shall be conducted for 24 hours. If there is no leakage, the next step of paving bricks can be performed. 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