When using chain-link fencing for security fences, strive for a height of 6’ or greater and a thickness of at least 9-gauge. Avoid solid barriers when erecting security fences. For, while a visual barrier is desirable when erecting privacy walls, it is counterproductive for security fences, affording trespassers a place to hide.

Thus the virtue of chain-link fencing: it is strong, yet see-through. Wrought iron also makes for fine security fences, for the same reasons. But while wrought iron is much more attractive than chain-link fencing, it is also much more expensive.