Chainwire vs Colorbond, timber and welded mesh: choosing the right fence in NSW

Chain mesh suits boundaries, yards and secure sites where you want to see through the fence and is the wrong pick for privacy, but in NSW your zone, each fence line's height limit and your bushfire status narrow the choice of material before looks or price do.

Choose chain mesh when you want to see through the fence: a boundary, a yard, a shed or a site you need to keep secure. Choose something solid when privacy is the point. Before either, check the rules, because in NSW a good part of the material choice is made for you.

On the NSW Planning Portal's exempt development page for fences, we count six rules that limit what a fence can be made of, how it is finished or how much it must let through. That is our count. We went through the page's general, residential and rural requirements and kept each one that names a material, a finish or a see-through requirement. Zone, height and bushfire status come first. Looks and price come after.

Chainwire, chain mesh and chain link are three names for the same woven wire fence. Here Aardvark Chainwire Fencing compares it with Colorbond sheet steel, timber and welded mesh panels, and shows where each one runs into a rule.

Six rules decide what your fence can be made of

Six exempt fence rules that limit material, finish or see-through, and where each applies
Rule Where it applies
1. Fences must be non-combustible or hardwood Bushfire prone land
2. Metal parts must be low reflective, factory pre-coloured materials All exempt fences
3. No electric fencing or barbed wire Residential, industrial and business zones (R5 excepted)
4. Side and rear boundary fences no higher than 1.8 m, or 1.2 m if masonry Residential zones R1, R2, R3, R4, RU5
5. At least 20% transparent above 400 mm Fences along a secondary road, residential zones R1, R2, R3, R4, RU5
6. Post and wire or post and rail, no higher than 1.8 m Rural and environmental zones
NSW Planning Portal, exempt development: fences (page last updated 20/06/2023)
Six rules: our count from the page

All six come from the NSW exempt development rules for fences, a page last updated in June 2023:

The second rule touches chain mesh and Colorbond alike. If you want the fence built without approval, ask whether the mesh, posts and rails are factory pre-coloured and low reflective before you settle on a finish.

A fence is not free of approval just because it is "only a fence": it is exempt only if it meets the height, material and zone limits, and bushfire-prone land adds the non-combustible-or-hardwood rule.

Some land sits outside the exemption altogether. Land on the State Heritage Register or under an interim heritage order, critical habitat and wilderness areas are generally excluded, and councils may set extra controls in koala habitat.

Which rule applies to which fence line on your block

Plan view from above of a corner residential block. A house sits near the front, with a back yard pool behind it. A primary road runs along the front and a secondary road along one side. Line 1, the side and rear boundaries: exempt, no higher than 1.8 m (1.2 m if masonry), shared with a neighbour, so the Dividing Fences Act 1991 applies. Line 2, the primary road boundary or setback: exempt, no higher than 1.2 m. Line 3, the secondary road: no higher than 1.2 m, at least 20% transparent above 400 mm. Line 4, the pool barrier: at least 1.2 m, 1.8 m where a boundary fence forms part. A shaded band outside the pool barrier is the 90 cm non-climbable zone. Arrow A: the pool gate swings outwards, away from the pool. Arrow B: exempt fence gates must not open outwards. Primary road Secondary road Neighbour 90 cm non-climbable zone Pool A House B Shared with a neighbour: Dividing Fences Act 1991 applies 1 1 2 3 4
Source: NSW Planning Portal; NSW Government

Most blocks have more than one kind of fence line, and each has its own limit. The side and rear boundaries, the road frontage, a corner block's secondary road and any pool barrier all answer to different numbers.

Gates are where people get caught out. The exempt rules say gates must not open outwards. A pool gate must swing outwards, away from the pool. That means two rules and two directions on the same block.

Chain mesh vs Colorbond, timber and welded mesh, side by side

Chain mesh compared with Colorbond sheet steel, timber and welded or panel mesh
Chain mesh Colorbond sheet steel Timber Welded or panel mesh
Privacy Low, see-through High, solid sheet High if closed-boarded Low, see-through
See-through Yes No Only if slatted with gaps Yes
Security and boundary use Used for boundaries and security; barbed wire not exempt in residential, industrial or business zones (R5 excepted) Blocks sightlines both ways Depends on design Depends on panel and height
Upkeep Ask what coating or finish is specified Hose at least every six months where not rain-washed, more often near the coast; painting voids the warranty on sheets, posts and rails (BlueScope) Ask what species and finish are specified Ask what coating or finish is specified
Bushfire behaviour Not part of the 2005 tests; check against the non-combustible-or-hardwood rule Manufacturer says it "resists the progress of fire" (manufacturer's claim); the solid steel fence kept its structure in all 2005 tests, though panels buckled and separated at joints Treated pine "ignited and burnt to completion" in all 2005 tests; open-slatted hardwood was less effective than closed Not part of the 2005 tests; check against the non-combustible-or-hardwood rule
Pool barrier Mesh holes no greater than 13 mm at 1.2 m; at 1.8 m, holes over 13 mm must not exceed 100 mm 1.8 m where a boundary fence forms part of the barrier Vertical gaps no more than 10 cm; climbable horizontal bars at least 90 cm apart Same mesh hole limits as chain mesh
Rules to watch Metal must be low reflective, factory pre-coloured Same metal rule; concrete must not touch rails or infill sheets (BlueScope) Hardwood is the timber named for bushfire prone land Same metal rule
Source: NSW Planning Portal; NSW Government; Colorbond; The Sydney Morning Herald

No material wins every row. Read the table by the job you need done.

Colorbond sheet steel. BlueScope says its fence "won't rot, it won't be eaten by termites and resists the progress of fire". That is the manufacturer's claim, and it quotes CSIRO's finding that sheet steel performed best in the tests. The same company's Colorbond FAQ sets some conditions:

There is upkeep too. Areas not rain-washed should be hosed at least every six months, and more often in coastal areas, which covers plenty of Newcastle. BlueScope also says warranty periods depend on end use and project location.

Timber. Hardwood is the one timber the bushfire prone land rule names. In fire tests reported in 2005, treated pine "ignited and burnt to completion" in every experiment, and open-slatted hardwood was less effective than closed.

Welded or panel mesh. On the rules, it sits with chain mesh. It is metal, so the low reflective, factory pre-coloured rule applies. It is mesh, so the pool barrier mesh limits apply if it fences a pool.

Where chainwire earns its place, and where it is the wrong choice

A galvanised chain mesh fence on round steel posts runs along the back boundary of a semi-rural Hunter Valley block. An open paddock and a stand of eucalypts are clearly visible through the mesh. A kelpie stands in the mown yard on the near side, and a corrugated-iron shed sits in the corner. The scene is in late-afternoon spring light.
Illustration: a chain mesh back boundary with the paddock in view

Chain mesh is the fence for keeping something in or out while still seeing through it. You can see who is at the gate, a dog stays in the yard, and the paddock beyond stays in view. At Aardvark Chainwire Fencing we work on chainwire, security and boundary fencing across Newcastle and the Hunter, and that open-sightline job is where chain mesh does its best work.

It also suits a rule that favours see-through fencing. On a residential corner block, a fence along the secondary road must be at least 20% transparent above 400 mm. Mesh lets light and sightlines through by design. A solid sheet above 400 mm has no openings at all.

Elevation of a fence along a secondary road, drawn no higher than 1.2 m, with a line marked at 400 mm. The band above 400 mm is labelled: residential zones: at least 20% transparent above 400 mm. Two variants sit under the same rule label. Left: chain mesh above a low plinth. Right: solid sheet infill, labelled: solid infill, no openings above 400 mm. Residential zones: at least 20% transparent above 400 mm 1.2 m max 400 mm Chain mesh above a low plinth Solid infill: no openings above 400 mm
Source: NSW Planning Portal

Chain mesh is the wrong choice in three places:

How high can you go without approval?

Horizontal bar chart of fence heights in metres. Exempt maximums are solid bars and pool minimums are hatched bars. Side/rear boundary, residential (exempt max): 1.8. Side/rear boundary, masonry (exempt max): 1.2. Road boundary or setback, residential (exempt max): 1.2. Rural and environmental zones (exempt max): 1.8. Business and industrial zones (exempt max): 3.0, 1.2 if masonry. Pool barrier (min): 1.2 minimum. Pool barrier where a boundary fence forms part (min): 1.8 minimum. A dashed line at 1.8 m marks a boundary fence that is also a pool barrier. Boundary fence that is also a pool barrier Side/rear boundary, residential (exempt max) 1.8 Side/rear boundary, masonry (exempt max) 1.2 Road boundary or setback, residential (exempt max) 1.2 Rural and environmental zones (exempt max) 1.8 Business and industrial zones (exempt max) 3.0 1.2 if masonry Pool barrier (min) 1.2 minimum Pool barrier where a boundary fence forms part (min) 1.8 minimum 0 m 1 m 2 m 3 m
Source: NSW Planning Portal; NSW Government

In residential zones, side and rear boundary fences can be no higher than 1.8 m, or 1.2 m if masonry. On the boundary of a primary or secondary road, or in its setback, the limit is 1.2 m. Rural and environmental zones allow 1.8 m. Business and industrial zones allow three metres, or 1.2 m if masonry.

Now put two pages side by side. A pool barrier must be at least 1.2 m high, or 1.8 m if a boundary fence forms part of it. If that boundary fence is also meant to stay exempt, the two numbers meet: at least 1.8 m for the pool and no higher than 1.8 m for the exemption leaves exactly 1.8 m. That is our reading of two separate pages, not a ruling. Confirm it with your council or a certifier before you build.

Chain mesh around a pool: check the hole size first

Two side-by-side elevations of a mesh pool barrier. Left: a 1.2 m barrier with a magnified mesh opening labelled: holes no greater than 13 mm. Right: a 1.8 m barrier with a magnified opening labelled: holes over 13 mm must not exceed 100 mm. Both show a gap under the fence of no more than 10 cm at the ground. A 90 cm arc from the top of each fence towards the ground on the outside marks the 90 cm non-climbable zone. A gate symbol shows the gate swinging outwards, away from the pool. 1.2 m barrier 1.8 m barrier Outside 90 cm 1.2 m Holes no greater than 13 mm Outside 90 cm 1.8 m Holes over 13 mm must not exceed 100 mm Gap under the fence: no more than 10 cm Gap under the fence: no more than 10 cm 90 cm non-climbable zone Pool Gate swings outwards, away from the pool
Source: NSW Government

The NSW limits for mesh or perforated pool barriers are specific:

Check any mesh against these limits before assuming it suits a pool. Compliance is decided by an inspection from the council or a registered certifier, not by the fence supplier.

The pool barrier standard has also moved on. Standards Australia's 2024 edition changed guidance on objects and plants in non-climbable zones and updated gate latch and hinge requirements, but the NSW pool page still lists the 1986, 2007 and 2012 editions, depending on when the pool was built, so ask your certifier which one applies to your pool. Our spring pool fence check covers the rest of the barrier and gate.

Bushfire-prone land: what the rules and the 2005 tests say

  1. SMH reports Bushfire CRC/CSIRO tests on steel, treated pine and hardwood fences (more than 20 experiments)
  2. Planning for Bush Fire Protection 2019 adopted, the current legislated version
  3. Draft PBP 2026 exhibited
  4. Draft PBP 2026: "cannot be used or relied upon until PBP 2026 is published and recognised under relevant legislation"
Source: The Sydney Morning Herald; NSW Rural Fire Service

On bushfire prone land, an exempt fence must be non-combustible or hardwood. The current legislated guideline is Planning for Bush Fire Protection 2019, adopted 1 March 2020. A draft PBP 2026 was exhibited from 6 August to 3 September 2026, and the RFS says it "cannot be used or relied upon" until it is published.

The question is live right now. The statutory Bush Fire Danger Period runs from 1 October to 31 March, though the RFS says "it may vary due to local conditions".

The best-known fence fire tests are old. Bushfire CRC and CSIRO ran more than 20 experiments on steel, treated pine and hardwood fences, reported by the SMH in December 2005:

Those tests were on solid steel and timber fences. They say nothing direct about chain mesh, and we will not stretch them to cover it. If your block is bushfire prone, check your chosen material against the non-combustible-or-hardwood rule with council before you commit.

A steel boundary fence on a rural-residential Hunter block where the yard meets dry eucalypt bushland in early summer. A strip of short mown grass runs along the fence. There is no leaf litter, woodpile or garden mulch against it, and a water tank stands well back in the yard.
Illustration: a steel boundary fence with a mown strip where the yard meets bushland

Sharing the fence with a neighbour

If the fence separates your lot from an adjoining lot, the Dividing Fences Act 1991 applies. That makes the material a two-household decision.

If you cannot agree, NCAT can order what the fence is made of, how high it is, where and when it is built, and how costs are split. A Fencing Notice must be served at least 1 month before applying. Our guide to who pays for a dividing fence in NSW walks through that notice step.

Questions to ask any fencer before you sign

Source: NSW Planning Portal; NCAT; Colorbond; NSW Government
  1. What zone is my block in, and which height limit applies to each fence line? (exempt rules)
  2. Is my land bushfire prone, and does this material meet the non-combustible-or-hardwood rule?
  3. Are the metal parts low reflective and factory pre-coloured?
  4. In a residential zone on a corner block, is the secondary road fence at least 20% transparent above 400 mm?
  5. Is barbed wire or electric fencing allowed as exempt development in my zone?
  6. Is this a shared boundary, and who prepares and serves the Fencing Notice?
  7. What coating or finish is specified for the mesh, posts and rails, and which Australian standard are they made to?
  8. For Colorbond: will concrete stay clear of the rails and infill sheets, and what warranty applies for my location?
  9. For a pool barrier: what is the mesh hole size, and who will inspect it?

Here are the numbers in one place.

The numbers in one place

1.8 m (1.2 m if masonry)exempt side/rear boundary, residential zonesNSW Planning Portal
1.2 mexempt fence on or near a road boundary, residential zonesNSW Planning Portal
20% transparent above 400 mmsecondary road fences, residential zonesNSW Planning Portal
1.2 m (1.8 m if a boundary fence is part of the barrier)pool barrier minimumNSW Government
13 mmmax mesh hole at 1.2 m pool barrier; 100 mm max at 1.8 m where holes exceed 13 mmNSW Government
10 cmmax gap under a pool fenceNSW Government
90 cmnon-climbable zoneNSW Government
At least 1 monthFencing Notice before applying to NCATNCAT
At least every six monthshose a Colorbond fence where not rain-washed, more often near the coastColorbond
Source: NSW Planning Portal; NSW Government; NCAT; Colorbond

Planning a chainwire fence? Tell Aardvark Chainwire Fencing about the job

If chain mesh suits your boundary, yard, shed or site in Newcastle or the Hunter, the next step is to describe the job to Aardvark Chainwire Fencing. Include:

Send those details through the enquiry form on our contact page. To compare finishes and styles first, see black chain wire fencing and spear top fencing.

Sources

Pictures in this guide are illustrations, not photos of our jobs.