Now that young people are under increasing pressure to buy houses, many people turn their attention to second-hand housing. Some netizens believe that: second-hand housing is cheaper than new homes, and the decoration industry can save some projects that do not need to be done, which can save a lot of expenses. In fact, this idea is not to be desired. It is really impossible to say which decoration is cheap. Some projects can be saved, but some cannot be saved.
Yangtze Floor Whirl Floor
Wall articles
Whether to eradicate the grassroots situation
In the house after 2000, if the putty layer did not empty or fall off, the original wall surface was covered with water-resistant putty. This kind of putty scraped hard on the wall and stuck firmly. According to the national regulations, it is currently used in construction projects. If there is no abnormality in water-resistant putty, it may not be eradicated during the second renovation.
The old houses before the 1980s and 1990s were refurbished and their wall coverings had to be completely removed. Because the walls of that era were made of ordinary white or hydrophilic putties, such wall bases were easy to fall off after encountering water, and their firmness was not strong.
Leveling or not depending on the material
The designer believes that after the original wall surface was removed, the cement mortar (or cement ash) base layer was seen. The entire wall surface was heavily uneven, and the amount of material used for leveling and the amount of filling were large. In places where the height difference was large, it was necessary to use Plaster leveling, and then base treatment according to the needs of the decoration. If you do not need to remove, you need to check whether you need to use the putty for leveling treatment.
(original wall) latex paint/wallpapers → (secondary wall decoration) latex paint/wallpaper: If the original wall surface is not strong, it is necessary to use an interface agent on the original wall surface putty to close the original wall surface, and then Then scrape the second layer of putty, brush latex paint or brush a layer of base film (a medium, the effect of curing or sealing the base) after the wallpaper.
If the original wall base is relatively firm and smooth, the second putty may not be granted. However, the color of the original wall latex paint should be taken into account: if the original latex paint is white, the latex paint can be directly brushed after grinding, removing floating dust or oil stains; if the latex paint is not white, the second time of brushing latex paint cannot cover the original color. , you need to scrape off the original wall surface latex paint, and putty leveling before painting.
(Original wall) latex paint / tile → (secondary decoration wall) tile: If the second decoration of the wall to be tiled, you need to remove the putty after the wall surface treatment. If the wall has not been removed (that is, the original wall surface is made of water-resistant putty), the wall must be cut after the hair is cut and the wire mesh is attached to the tile. If the pulling is not done well, the wall will be in contact with the tide, the waterproof layer will fall off, the grass will be empty, and the tiles will detach. If the original wall surface is tiled, the tile can be knocked off and repaved, but it is not possible to level, but it is necessary to determine the firmness of the combination of the sand ash layer and the wall surface.
Light walls or inner heat insulation walls are prone to cracks. In order to prevent cracking of the walls, it is necessary to do patching. It is recommended that such walls be patched. If the walls are peeled off, cracks appear in some places, and they must be patched before being approved for putty.
Hydropower renovation
Waterway into the wall is more beautiful
In the old houses in the 1980s and 1990s, the upper water pipes were all galvanized pipes, and they had many joints. They were prone to leaking, rusting, and they were prone to aging and cracking after a certain number of years. The galvanized tube is not beautiful, so it is recommended to replace it all.
In recent years, PPR pipes have been used in the upper water pipes of the house. This pipe is a one-time hot-melt molding and the joint is safe. It can be directly buried in the wall and has beautiful appearance and long service life. However, some of the water pipes are exposed outside the wall. In addition to affecting the appearance of the water pipes, it is also difficult to install a faucet or a mixing valve. It is advisable to reconstruct the water pipes and bury the pipes in the wall.
Circuit modification as required
Most of the old houses in the 1980s and 1990s used aluminum wire. With the increase in the number of home appliances, the power becomes larger, and the line is frequently tripped even after a line is added. In some homes, only one switch controls all the circuits and the use is inconvenient. It is recommended that all the old houses be rerouted and re-distributed using distribution boxes after entering the household line: kitchen all the way, bathroom all the way, lighting all the way, bedroom and living room outlet all the way, air conditioning can go all the way, the circuit is divided into four or Five way. The cross-section of a typical home line is 4 square millimeters or 6 square millimeters, and there is no problem of re-tripping as long as the total household power does not increase. If the house meets these designs and no new sockets or circuit adjustments are made, no circuit modification is required.
Some also need to make partial circuit transformations, mainly to facilitate life or meet the electricity demand of new space. If there is a socket on one side of the bedroom, although there is no security risk, it will bring inconvenience to the life. In the renovation, the circuit will usually be rebuilt.
Ground articles
Laminate flooring needs leveling
Professionals said that if the floor of the second decoration is to be laid on a composite floor, leveling should be done before. If it is not leveled, the grass-roots floor is not strong, and after laying on the floor, it will return sand from the gap in the floor or up the corner. In addition, because the ground is uneven, the floor will gradually loosen, and when you step on it, you will hear a loud bang. There are two main situations for ground leveling:
1. The original house was paved in the living room floor and the bedroom was floored. The cement mortar used to tile the floor raised the floor so that there was a drop of 2 cm to 3 cm between the bedroom and the living room. In order to change this situation in the second renovation, it is necessary to level the bed before the bedroom.
2. During the second renovation, many homes will make partial circuit modifications due to the addition of sockets or changes in the function of the room. The wires will usually pass through the ground. The state requires that the ground is not allowed to be cut. This requires elevation and leveling of the ground. Use a screed to bury the pipeline on the ground and then lay the floor.
If the original shop is a composite floor, the second floor of the renovation is also a composite floor, and does not require circuit transformation, in general, the ground itself is very flat, basically can be directly paved floor.
Paving bricks in special circumstances also need to be dealt with
In some special cases, paving bricks also need to be leveled separately. For example, bungalows, villas and other grounds are rough when the new house is delivered, and some lands are inclined in one direction, and some pits are very serious. If there is no treatment at the time of the initial decoration, a separate elevation leveling will be required for the second renovation.
Some building rooms have balconies that are lower than the rest of the rooms and the bathrooms are taller than the other floors and need to be raised and leveled with light bricks or ceramsites.
For buildings, floor leveling is generally not required before laying tiles. Because the cement mortar used for laying tiles generally has a thickness of less than 3 cm, it can serve as a screed.
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Sandwich Panel
What are the methods for judging the pros and cons of sandwich panel?
The material of the sandwich panel directly affects the later use. Sandwich panels are the main building materials for Prefabricated House and Steel Structure Warehouse. If you want to choose high-quality panels, you must have an understanding of their basic quality. There are many types of boards on the market, and their core materials, steel plates, adhesives, etc. are different, and the quality will also be affected. So how to judge its pros and cons?
check edge
Because the sandwich panel has several layers, it is difficult to judge its internal quality from the surface. Therefore, it is still necessary to observe its exposed edges first, and it is necessary to pay attention to whether its cross-section is clean and ensure that it is tight. If there are problems such as graying and impurities, then there must be problems in quality, so it is still necessary to do a good job of cross-sectional inspection.
Tap to hear the sound
If it is a relatively good board, you can simply tap it with your fingers. If the sound is a crisp metallic sound, then it is a relatively good board. The fire rating of the Rock Wool Sandwich Panel is Class A, and the fire rating of the polyurethane sandwich panel and Eps Sandwich Panel is B1.
Note the thickness
The thickness of the sandwich panel directly affects the long-term use in the later period. It is necessary to observe the substrate, peritoneum, etc., especially the thickness and quality of the coating, which we cannot ignore. It is necessary to choose a plate with a relatively thick coating and guaranteed quality. Generally, the thickness of the substrate should be about 0.4-0.8MM. If you see the real thing, you should also measure it. The thickness of the finished product is 50mm, 75mm, 100mm, 150mm. The bulk density of the core material is also an important link that affects the quality.
certificate
In fact, as long as it can cooperate with regular manufacturers, the plates sold by the manufacturers need to go through various inspections, and the quality must meet the regulations. Therefore, when purchasing, you can directly check whether it has a certificate of conformity. If you choose a plate from a regular manufacturer, you can not only enjoy a preferential price for direct sales from the manufacturer, but also enjoy good after-sales service.
Now there are many manufacturers supplying plates, and the market quotations and quality of each manufacturer are also different, so it is still necessary to do a good job of quality comparison and price measurement. It is suggested that when purchasing sandwich panels, one must pay attention to its specific quality, and compare the quality of the actual products in order to select high-quality panels.
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Henan Jinming Metal Material Co., Ltd. , https://www.hnjmmetal.com