内壁

1. Origins, structure, and basic meaning

• Structure: 内壁 (ないへき) combines inside 内 and wall 壁 to denote an interior wall.
• Basic usage: It is repainted inside a room or inspected for cracks within a building.

2. Common pitfalls and similar expressions

• Interior versus exterior wall
  • 内壁 faces the building's inside spaces and differs from the exterior wall exposed directly to weather.