There is no universal panel thickness suitable for every project. The correct thickness depends on structural loads, support spacing, and service conditions.

Typical recommendations include:
| Application | Recommended Thickness |
|---|---|
| Interior Wall | 10–15 mm |
| Ceiling | 10–20 mm |
| Curtain Wall | 20–25 mm |
| High-Rise Building | 25–30 mm |
| Marine Interior | 15–25 mm |
| Transportation | 15–30 mm |
| Stone Composite Panel | 20–40 mm |
Increasing panel thickness improves bending stiffness but also affects material cost and weight. Engineers often optimize panel thickness together with support spacing to achieve the best balance between performance and economy.

