Preventing uneven ground on the ground will cause some floors and keels to hang, and will sound when pedaling.
     The moisture content of the wooden keel that prevents the keel from being dried and not dried is usually about 25%, and the moisture content of the qualified wooden floor is generally 12%. The humidity difference will cause the wooden floor to quickly absorb moisture, causing the floor to erect and the paint surface to burst. . The floor is laid before construction and then other construction is carried out on the floor. However, after the floor is laid, it often takes a month or more to polish the paint. During the period, the floor and the surrounding water vapor and chemicals did not provide any isolation measures, which may cause the wood floor to be deformed due to the sharp change of water content.
     To prevent over-tightening or over-tightening when laying the floor, the tightness of the wooden floor should be reasonably arranged according to the temperature and humidity of the environment. If it is too loose, the floor will shrink and there will be a large gap. If it is too tight, the floor will erect when it expands.
     Preventing the use of wooden wedges and nails in the fixed way of construction using wooden wedges and nails, which will result in insufficient nail holding force due to the small contact surface between the wooden wedge and the nail, which will easily cause the wooden keel to loosen. There will be a noise when you step on the floor.
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