1. The main reason is that the wooden structure usually deforms (solid wood deforms less), which can be understood as how the wooden floor does not deform!

2. The 12 anti beta (phenolic resin board) on the market also has deformation, and some manufacturers have no choice but to make laminated doors (which overlap on the vertical board) to avoid this problem.

3. The composite boards on the market are also severely deformed. If that company says that their composite boards do not need to be deformed, it is deceiving people.

4. Only the metal composite plate will not deform, and the metal plate has built-in honeycomb; The substrate has been melted and shaped, and there is no deformation.

The merchant's choice of metal plates is correct; Based on the current situation of toilets in China; The cleaning worker is very irresponsible in using water, thinner, or liquid with chemical composition to wipe and wash the metal plate, causing corrosion and peeling damage to the plate; As long as it is properly protected for 10-20 years, there is no problem.