Due to environmental reasons, humidity is likely to be the main factor affecting the cracking and deformation of plywood. plywood absorbs moisture in the surrounding environment, causing it to gradually dry and shrink during long-term use, resulting in cracking and deformation of the joint.

Measures to prevent plywood from cracking: 

1. When the room is too humid, it is recommended to take appropriate sealing measures to reduce the moisture absorption of plywood. 

2. If you want to avoid such problems, you must minimize the air humidity in the room during the construction period and keep the room well ventilated. Before continuing, try to wait until the concrete moisture content reaches the standard.