Installing Welded Mesh Fence Panels the Right Way

A welded mesh fence looks simple until the panels sag, the posts lean, or the cut edges bleed rust down the wire. This guide covers the parts that actually decide whether a mesh fence stays tight and square: setting posts, cutting and joining panels, protecting cut ends, and dealing with slopes. Follow it and your fence will stay rigid and clean for its full life instead of loosening in a season.

Rigid panels versus rolled mesh

Welded mesh fencing comes two ways, and they install very differently.

Type	Rigid welded panels	Rolled welded mesh
Rigidity	Self-supporting, no straining	Needs tensioning wires
Look	Crisp, commercial, security	Utility, gardens, animal runs
Post spacing	Fixed to panel width	Flexible
Slopes	Step down per panel	Follows ground

Rigid panels are held between posts and need no tensioning. Rolled mesh must be pulled taut against line wires or it sags. Mixing up the two methods is where a lot of installs go wrong.

Setting the posts

Posts do the structural work; the mesh only spans between them. Get the posts right and half the job is done.

Spacing and depth

For rigid panels, post centres must match the panel width plus the fixing clips, so measure the actual panels before digging. As a rule of thumb, set posts at least a quarter to a third of their above-ground height into the ground, concreted, and deeper on soft ground or for tall security fencing. A shallow post is the usual reason a fence leans after the first winter.

Line and level

Run a string line for the full run and set every post to it. On a slope, decide early whether you will step the panels down in level sections or rake them to follow the ground; rigid panels almost always step, rolled mesh can rake.

Cutting and joining panels

You will need to cut panels to close a run or fit a corner. Cut with a disc cutter or heavy bolt croppers, cutting close to a weld so you do not leave long unsupported stubs that spring loose.

Protect every cut end

Cutting exposes bare steel through the galvanising or PVC. Untreated, that is exactly where rust starts. Brush a zinc-rich cold galvanising paint onto every cut, and on PVC-coated mesh add a colour-matched touch-up over the top. Two minutes per cut saves years of rust streaks.

Joining panels

Join rigid panels at a shared post using the manufacturer’s clips or brackets, not random wire, so the fence keeps its line and the security rating is not compromised. For rolled mesh, overlap panels by at least one full aperture and tie with the same-grade wire.

Tensioning rolled mesh

Rolled mesh only stays flat under tension. Fit straining posts with struts at each end and every corner, run line wires along the top, middle, and bottom, tension them with a strainer, then tie the mesh to the line wires. Never rely on the intermediate posts to hold tension; they only support the mesh between the straining posts.

A real scenario: the sagging boundary fence

An installer put up 30 m of rolled welded mesh by stapling it straight to timber posts with no line wires and no straining posts. It looked fine on day one. After a few months of wind and its own weight the mesh bellied between every post and the cut ends at the gate had rusted orange. The fix: fit strutted straining posts at both ends, run and tension three line wires, re-hang the mesh to the wires, and paint the cut ends. The materials were fine; the method skipped tensioning entirely.

Common mistakes and how to fix them

Posts too shallow. The fence leans. Fix: dig deeper and concrete, especially for tall panels.

Guessing post spacing for rigid panels. Panels do not fit. Fix: measure real panel width plus clips first.

Leaving cut ends bare. Rust streaks within months. Fix: zinc-rich paint on every cut.

Rolled mesh with no line wires. It sags. Fix: strutted straining posts plus tensioned line wires.

Random wire joins on security fencing. Weak point and poor looks. Fix: use the maker’s clips at a shared post.

Installation checklist

• Confirm rigid panels or rolled mesh before ordering posts.
• Measure panel width and set post centres to match.
• Set posts deep, concreted, and to a string line.
• Decide step-down or rake for any slope.
• Fit strutted straining posts at ends and corners for rolled mesh.
• Cut close to a weld; treat every cut end with zinc-rich paint.
• Join panels with proper clips, not loose wire.
• Tension line wires before hanging rolled mesh.

Conclusion and next step

A tight, rust-free mesh fence is mostly about post depth, the right cut-edge treatment, and tensioning where it is needed. Your next step: walk the line, mark every post position against your actual panel width, and note where the ground forces a step-down before you order materials.

FAQ

How deep should mesh fence posts go?

As a guide, a quarter to a third of the above-ground height, concreted, and deeper for tall security fencing or soft ground. Depth, not post thickness, usually decides whether it leans.

Can I cut welded mesh panels on site?

Yes, with a disc cutter or bolt croppers. Cut close to a weld and always seal the bare ends with zinc-rich paint, or that is where rust will start.

Do rigid mesh panels need tensioning wires?

No. They are self-supporting between posts. Only rolled mesh needs straining posts and tensioned line wires.

How do I fence a slope with rigid panels?

Step the panels down in level sections between posts. Rigid panels do not follow ground contours the way rolled mesh can be raked.

References

• BS 1722-14 – Fences: specification for open mesh steel panel fences.
• BS EN 10223-4 – Steel wire and wire products for fencing: welded mesh fencing.