Security fencing
Security fencing should start with a question: what are you protecting, and from whom? Opportunists, vehicles and determined intruders all need different answers.
Layers that make a difference
Height, climbability, visibility and access control matter more than material. A 2.4m mesh fence with no footholds and a clear sightline outperforms a 2m palisade tucked behind overgrown planting.
Gates are almost always the weak point. Matching the gate specification to the fence, and specifying proper locking, is where most perimeters are won or lost.
Residential security
For homes, the priority is usually the side and rear access rather than the whole boundary. A well-built lockable side gate and a solid close board rear boundary deal with most realistic risk.