Why there is a large gap after the multi-layer sol

2022-07-22
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The deformation of multi-layer solid wood composite floor is the smallest among many floors, and the deformation is only about 1/20 of the maximum deformation of solid wood floor chord cutting. There should be no large gap after paving. In general, the maximum expansion and contraction of a single 125mm wide floor in northern China will not exceed 0.2mm

the deformation of multi-layer solid wood composite floor is the smallest among many floors, and the deformation is only about 1/20 of the maximum deformation of solid wood floor chord cutting. Large gaps should not be generated after paving. Generally, the maximum expansion and contraction of a single 125mm wide floor in northern China will not exceed 0.2mm

after correct paving, the actual moisture content of the floor in northern China is 12% - 13% in summer, and 6% - 7% in dry and hot environment in winter (air relative humidity is about 30%). In geothermal environment, the final equilibrium moisture content of the floor is 4% - 5%. In other words, the moisture content of the floor after pavement should reach 12% - 13% in summer (rainy season), and the floor is in the maximum physical state

if the floor is glued and suspended, the floor of the room will form a whole. When the moisture content changes, the floor of the room will expand and contract as a whole. At this time, if heavy furniture is placed symmetrically on both sides of the room. When winter comes, the room is relatively dry, and the floor will inevitably shrink. As the weights on both sides are pressed, it is bound to cause individual parts of the floor in the middle of the room to open, concentrating the cumulative dry shrinkage into one or several gaps, resulting in large floor gaps. If the edges of the floor are not glued, the whole dry shrinkage of the floor of a standard room with a width of 3 ~ 4m is less than 5mm under the geothermal environment, and the maximum dry shrinkage of each floor is within 0.2mm, which is difficult to see with the naked eye. It is easy to repair without glue, and the gap can be evenly distributed. To prevent the floor from moving, a spring can be used between the floor and the wall. No matter how the furniture is placed

in addition, although the deformation of multi-layer solid wood composite floor is small, due to the structure, the length and width of multi-layer solid wood composite floor are deformed. Generally speaking, the length of the floor is more than 8 times the width. Under the same conditions, the deformation in the length direction is also a multiple of the width deformation. Therefore, it is normal that the end gap of multi-layer solid wood composite floor is larger than the side gap

based on years of experience in floor identification and complaint handling, the author believes that:

in the case of geothermal or electric heating, due to the large range of changes in the moisture content of the floor in summer and winter, if the multi-layer solid wood composite floor is glued and suspended, and the indoor furniture and heavy objects are placed symmetrically, the floor cannot move freely as a whole, and several large cracks (drying shrinkage is concentrated to several cracks) will be generated

if the multi-layer solid wood composite floor is glued and suspended, the method to prevent large gaps:

1. The weight in the room is best placed on one side of the room

2. Humidify with humidifier in winter. It is best to adjust the indoor air humidity to 50% - 60% to reduce the variation range of indoor equilibrium moisture content

suspension pavement without glue on the side of the floor can be selected, and the side is supported by a spring to ensure that the floor does not move to the edge, so that the gap is evenly distributed. And glue the joints at the end of the floor, try to reduce and avoid the symmetrical placement of heavy objects along the length of a single floor (a single floor), ensure the free movement of the length of the floor, and reduce the chance of cracks at the end. Once there is a gap at the end, because there is no glue on the side and the friction resistance is small, you can put a tensioner at both ends of the floor in a single trip to tighten the joint of the end of the floor to eliminate the gap at the end, which is convenient for maintenance

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