Solid wood composite flooring is favored by more and more consumers because of its natural appearance and excellent performance. However, solid wood composite flooring often encounters many problems in the process of purchasing and paving. Today, Xiao Bian has collected 4 cases of complaints that are often encountered in solid wood composite floors, and analyzes the causes of the problems and the solutions to them for your reference. I. Why does the discoloration occur after paving solid wood flooring? The discoloration of wood is mainly caused by the absorption of ultraviolet light. The sapwood and heartwood of wood have different degrees of discoloration after absorbing ultraviolet light, which will cause a certain color difference in the floor after pavement. The surface of the multi-layer solid wood composite floor is natural wood and possesses the natural properties of the wood. The photochromism produced is a normal phenomenon and it is not a product quality issue. The color change response of most woods is shallow and deep, and only a few woods are darker and lighter, and the discoloration on the same floor is basically the same. Therefore, the floor after pavement should not be exposed to sunlight for a long time, and the necessary light shielding measures should be taken. Influence of external factors: At present, most of the complaints I receive stand in the geothermal environment except normal photochromism. Before the geothermal floor pavement, the moisture content of most floors was about 20%. During the floor laying process, due to the damage of the moisture-proof membrane, a large amount of moisture blew into the floor from the damaged place during the floor heating, resulting in a sharp increase in the moisture content of the floor. Some of the solubles dissolve out and some of the discoloration bacteria act to cause the wood to deteriorate or change blue. In individual cases, in wet areas such as bathrooms and kitchens, the influence of external moisture may also cause discoloration of the local floor. The above-mentioned discoloration of the floor is generated in the wetted part of the floor, and the interface between the discolored area and the uncolored area is very obvious, and it is continuously distributed among several floors. Causes: 1. The ground is uneven and there are bumpy pits. After the floor is paved, the damp-proof film is broken, resulting in air permeability. Take measures to level the floor before installing the floor. 2, when paving, there is sand on the ground, not cleaned, the moisture-proof membrane mat broken, resulting in air. The measure is to clean the floor before paving. 3, when the pavement moisture-proof membrane joints are not sticky, resulting in air permeability. The moisture-proof film should be taped tightly, and it is better to use a plastic tape with a width of more than 60mm to ensure that the moisture-proof film is airtight. 4. In some areas, electric heating is used. Since the electricity charges adopt the peak, valley and flat charging methods, that is, half price (valley) after 12 o'clock in the evening, many users turn off the switch during the day and turn on the electric heating equipment after 12 o'clock in the evening. The indoor temperature was adjusted to 27 to 30°C, and the surface temperature reached nearly 100°C in a short period of time, resulting in the destruction of the moisture-proof film, resulting in air permeability, and discoloration and deformation of the floor. This violates the requirement for geothermal heating (surface temperature controlled at around 40°C). It is recommended that users should change to 24 hours of continuous heating, otherwise, the user should be responsible for the discoloration. 5, when the floor paving to the interface with the wet interface, such as: bathroom, kitchen, shade balcony, etc., the damp-proof membrane should be returned to the top, use the moisture-proof membrane to wrap the edge of the floor to prevent moisture from entering, reduce and avoid the area The discoloration and deformation of the floor. Second, after the multi-layer solid wood composite floor pavement why there is a big gap? Multi-layer solid wood composite floor in the number of floors in the deformation is the smallest, the deformation is only the solid wood flooring chord maximum deformation of 1 / 20 or so, after the pavement should not produce a larger gap. In general, the maximum expansion and contraction of a single 125mm wide floor in the northern region will not exceed 0.2mm. After correct paving, the actual moisture content of the floorboards in the northern areas in the summer is 12% to 13%, the dry and hot environment in winter (air relative humidity is about 30%), and the floor moisture content is 6% to 7%. In the geothermal environment, the final equilibrium moisture content of the floor is 4% to 5%. In other words, the moisture content of the floor covering after the summer (in the rainy season) will reach 12% to 13%, and the floor will be in the largest physical state. If the floor is glued and floated, the floor of the room is formed as a whole. When the moisture content changes, the floor of the room expands and contracts. At this time, if the room is symmetrically placed on both sides of heavy furniture. When the winter comes, the room is relatively dry, the floor will inevitably shrink, due to the weight of both sides of the pressure, will inevitably cause the individual room in the middle of the room to pull open, the cumulative shrinkage is concentrated in 1 or several gaps, resulting in a larger floor Gap. If the floor is not glued, 3 to 4m wide standard room, under the geothermal environment, the room floor shrinkage less than 5mm, the maximum shrinkage of each floor within 0.2mm, with the naked eye is difficult to see. No glue is used for maintenance, and the gap can be evenly distributed. To prevent the floor from flapping, springs can be used between the floor and the wall. No matter how the furniture is placed. In addition, although the deformation of the multi-layer engineered wood flooring is small, the structure determines the length and width direction of the multi-layer parquet flooring. In general, the floor length is more than 8 times the width. Under the same conditions, the deformation in the length direction is also the width. The multiple relationship of deformation, therefore, multi-layer solid wood floor than the side gap is also normal. Third, after the multi-layer solid wood composite floor pavement why produce noise? Most of the multi-layer engineered wood floors are laid directly on the ground. The reason that the sound is generated after the floor is laid is that when the people move on the floor, the floor moves up and down, the sides and sides of the floor and the tongues and tongues. The friction between the sound produced. The up-and-down movement of the floor is the main factor. In many cases, the floor is not completely covered, and sound is generated after use or paving. When we accepted the complaint, many people were controversial about the looseness of the floor (the gap between tongue and tongue is too large). If it is really loose, why is the floor just finished and it will only ring after a while. Even if it is a loose floor we put it flat on the flat marble floor, no matter how we walk on the floor will not produce noise, the reason is that the floor is in close contact with the ground, the floor does not move up and down when people walk, the floor There is no relative movement between the sides and the sides, between the tongue and the tongue and groove, there is no friction, and the sound naturally does not exist. Therefore, the key to solving the problem of sound after floor covering is to solve people's stepping on the floor and ensure that the floor does not move up and down. Fourth, after the solid wood composite floor pavement why there will be collapse phenomenon? Since the beginning of summer, the amount of rainfall in the north has gradually increased, the humidity of the air has increased, and complaints about the collapse of multi-layer solid wood composite flooring and lacquer-locking composite flooring (MDF as the base material) have also been increasing. According to the analysis of the complaints, there are mainly The following factors: 1, product production factors After the multi-layer solid wood composite floor and lacquer-lock composite flooring (MDF is a substrate) are opened, the paint overflows to the floor of the floor during the process of roller coating or shower coating. The actual width of the paint film is greater than that of the floor. The width of the surface layer creates hidden dangers for floor collapse. The more paint spills, the greater the chance of floor collapse. For the production process of painting after the first opening, the phenomenon of paint spillage is unavoidable. In accordance with the corresponding product standards, although it cannot be judged as a quality problem, we must pay close attention to and take measures to minimize the thickness of each painting, especially It is more important to apply the coating and minimize the paint spillage. 2, installation factors Due to the over-tightness of the floor or the slight bending of the floor, the installation resistance of the floor is large, and the knocking force during floor installation is too large and uneven, resulting in the partial edge paint film jagged. Its characteristic is that it can be found after installation, there is no regular random distribution, the number of occurrence is less. The measure is to use a piece of floor board when the module is against the installed floor, and then tap the module with a rubber mallet to make the floor close to each other. The hammering process should be uniform. In addition, when using a keel to install a multi-layer engineered wood flooring, some people hit nails on the tongues, and because the nail caps are not sinking into the tongues, when the next floor is installed, it appears on the surface of the tongue and nails. Convex small packets, severe collapse will appear at the edge of the packet. It is characterized by the fact that the chippings can be found after installation, have a regular distribution, and have fewer occurrences. Take measures to nail the side of the groove while installing the floor. 3, uneven ground Due to the unevenness of the floor, after the floor is paved, gaps are created between the floors of the individual places and the ground. During walking, the floor moves up and down, and the side edges between the floors rub against each other to cause collapse. Its characteristic is that after the floor is laid, the collapse occurs in the area where people often walk and is partial. Take measures to be sure to measure the flatness of the ground before laying the floor. The flatness should be less than 3mm/2000mm. If the ground does not meet the requirements, it should be leveled before paving. 4, there is insufficient reserved space around the floor pavement Insufficient reserved space around the floor paving leads to floor arching. The gap between the floor and the floor creates a gap. During walking, the floor moves up and down, and the sides of the floor rub against each other to cause collapse. It is characterized by the fact that the collapse of the floor often occurs after the pavement has been installed for a period of time, in the areas where people often walk, and is multi-pointed. The observation floor has been in close contact with the wall. Take measures to leave gaps around the floor, especially in the entrance, wall kitchen, balconies and other areas to leave gaps to ensure that the reserved gap is uniform. When the pavement length exceeds 8m, it should be cut off and bridged. 5, moisture-proof membrane ventilation After the floor is paved, the damp proof membrane joints are not sealed with tape, and the damp proof film in some places is damaged during the pavement process, causing leakage of moisture on the ground. A lot of moisture enters the back of the floor, and the floor produces uneven expansion, which causes the floor to deform. Slight distortion, creating a gap between the floor in the local area and the ground. As people walk around, the floor moves up and down, and the sides of the floor rub against each other to cause collapse. Its characteristic is that there may be gaps between the wall and the floor. Take measures before the floor pavement, moisture-proof membrane joints must be sealed with tape to ensure airtight. 6, indoor furniture (weight) placed symmetrically After the floor is paved, because the heavier items such as furniture, bookcases, fish tanks, etc. are placed symmetrically on both sides of the room, the floor is pressed, impeding the floor from absorbing moisture and expanding, the floor cannot move, and regional bulging occurs, as people walk around In the middle, the floor in the area was broken. Take measures to place heavy objects on one side as much as possible to ensure that the floor is free to move on one side. Xiao Bian concludes: Solid wood composite flooring is favored by more and more consumers because of its natural appearance and excellent performance. However, solid wood composite flooring often encounters many problems in the process of purchasing and paving. Therefore, everyone Be sure to pay attention when purchasing and installing. 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