The ground seam of the solid wood floor is normal by centimeters

It depends on the material and area of the floor to be installed. In general, the seam between the board should not exceed 1mm, and the floor and wall should be about 1cm. If large venues such as gymnasiums or shopping malls require that the maximum seam between the boards should not exceed 3mm, and the floor and wall should not be greater than 3cm.

The seam between the panels of the outdoor floor should not exceed 1cm.

It is inevitable that there are seams in the solid wood floor, but too many gaps are not allowed, if the floor installation and the floor are one, you can find them, the size of the gap meets the GB T20238 2006 standard, serious out-of-tolerance, you can not pay, ask to replace the floor, or re-construction.

It's a wet swelling and shrinking. The denaturation of wood requires a microscopic view! You can take a look, the gap is parallel, if not, it is a quality problem of the accuracy of the floor, it is the reason for double short milling or four-sided planing, and it should be accurately measured with vernier calipers!

GB T20238 2006 clearly stipulates that the quality requirements for solid wood floor paving: the assembly and separation of seams are not greater, and this value should be accepted within 3 days; During the shelf life, the solid wood floor assembly is not greater than the seam, from the GB point of view, the solid wood floor joint value is larger (compared with the laminate flooring assembly and seam of the above two values: , far less than the solid wood floor), and the lock splicing effect is related to the installation method.

Upstairs is correct, add 10 points, and give me the remaining 10 points.