- Utility: Wood Bamboo Wall
- Requirement: 35 woods
- Destruction Panel (F7): 12 woods
- Chance for withstand trebuchet/siege ballista/glider projectile: 0%
upgrade 1 (F6): Stone
- Utility: Stone Bamboo Wall
- Requirement: 35 Stones
- Destruction Panel (F7): 12 woods + 12 stones
- Chance for withstand trebuchet/siege ballista/glider projectile: 50%
Upgrade 2 (F6): Bronze
- Utility: Bronze Bamboo Wall
- Requirement: 10 woods + 20 Bronze ingots
- Destruction Panel (F7): 18 woods + 6 Bronze ingots
- Chance for withstand trebuchet/siege ballista/glider projectile: 66%
Upgrade 3 (F6): Volcanic
- Utility: Volcanite Bamboo Wall
- Requirement: 35 Volcanites
- Destruction Panel (F7): 12 woods + 12 Volcanites
- Chance for withstand trebuchet/siege ballista/glider projectile: 75%