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Home | Corten Steel Garden Edging | Heavy-Duty 3mm Corten Garden Edging Melbourne | Chippy’s Outdoor

3mm Corten Steel Garden Edging - Heavy Duty

$39.50 AUD
$39.50 AUD
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Size: 100mm x 3mm x 3.0m

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Chippy’s Heavy-Duty Corten Garden Edging is a thicker, more rigid alternative to our original 1.6mm Flat Edge. Made in Melbourne from solid 3.0mm weathering steel, it is suited to straight lawn edges, garden borders, paths and raised landscape features. Each length finishes at 3.0 metres and uses a rear joining plate to create a clean butt join.

  • Solid 3.0mm weathering steel
  • Finished 3.0m lengths
  • Available in 100mm, 150mm and 300mm heights
  • Flat, heavy-duty profile
  • Clean end-to-end butt joins
  • Great for straight line and softer curves
  • Rear joining plates keep the visible face uninterrupted
  • Screw-hole marking template supplied
  • Matching Corten pegs and reversible corners available
  • Supplied raw grey to develop a natural rust-coloured patina
  • Designed and made in Melbourne

Heavy-duty flat Corten edging

Chippy’s developed its Heavy-Duty 3.0mm Corten Garden Edging for customers and landscapers who wanted a thicker version of a traditional flat steel edge. It creates a clear border between lawns, garden beds, gravel, mulch and pathways while developing the same natural rusted finish as our other Corten products.

At almost twice the thickness of our original 1.6mm Flat Edge, the 3.0mm profile is noticeably heavier and more rigid. It is particularly suited to long straight runs and projects where a thicker steel edge is preferred.

The system is deliberately separate from our 1.6mm Flat Edge. Rather than overlapping at the joins, each 3.0m length meets the next with a square butt join. A joining plate sits behind the connection, leaving the front face clean and helping adjoining engths remain aligned.

This is still garden edging, not a structural retaining wall. It can define raised landscape features and manage ordinary garden separation, but substantial soil pressure, major level changes and structural loads require a properly designed retaining system.

Hardware

Joining plates and pegs are installed behind the front facing side of the edging. This also allows adjoining lengths to meet end to end instead of overlapping, ensuring a smooth finish.
Use the 100mm height for lower lawn divisions, paths and changes between gravel, mulch and garden beds. The 150mm height gives the border more presence and can manage modest changes in the finished landscape level. The 300mm height creates a deep, prominent edge for raised garden features where considerably more of the steel is required below or above the finished ground line.

Like the 1.6mm, the 3.0mm is also being offered exclusively in 3 meter lengths. The square ends meet rather than overlap, so adjoining pieces maintain the same 3.0mm face thickness through the join. The joining plate is centred behind the connection and fixed to both lengths.

Because the edging is supplied without pre-drilled joining holes, a screw-hole marking template is supplied with the system. It provides a repeatable hole position while allowing each join and corner to be aligned on site before drilling.

Internal and external corners

We offer one 90 degree corner that can be inverted for use as either an external or an internal corner join. It is available in 100mm, 150mm and 300mm heights and each length is connected to each other using a joining back plate that secures each length whilst being able to butt join together.

Supplied raw to weather naturally

The steel is supplied raw grey rather than already rusted. Exposure to moisture followed by drying gradually changes the surface through orange, brown and deeper rust tones. The timing and colour will vary between installations because the finish develops outdoors rather than being painted onto the steel.

Rust-coloured runoff can occur while the patina develops and may mark concrete, paving, natural stone and other porous surfaces. Consider nearby materials and drainage before installation.

  • Product: 3mm Corten Steel Garden Edging – Heavy Duty
  • Profile: flat edge
  • Material: Corten weathering steel
  • Thickness: 3.0mm
  • Finished length: 3.0m
  • Heights: 100mm, 150mm and 300mm
  • Joining method: end-to-end butt join with a rear joining plate
  • Joining plate: Chippy’s 1.6mm Safe Edge joining plate in the corresponding height
  • 300mm connection: uses the 280mm joining plate, positioned behind the edging
  • Joining holes: marked on site with the supplied screw-hole marking template
  • Surface when supplied: raw grey weathering steel
  • Developed finish: naturally changing orange-brown Corten patina
  • Manufacture: Melbourne, Australia
  • Compatible supports: Chippy’s 3.0mm Corten edging pegs
  • 100mm and 150mm edging: use 25 × 395mm Corten pegs
  • 300mm edging: use 25 × 500mm Corten pegs
  • General peg allowance: four to five pegs per 3.0m length, adjusted for the soil, finished height and layout
  • Corners: one reversible 90-degree corner for internal or external use
  • Corner heights: 100mm, 150mm and 300mm
  • Intended use: lawns, garden beds, gravel, mulch, paths and non-structural landscape features

The 280mm joining plate sits slightly below the top and bottom of the 300mm edging. It still supports and aligns the butt join while keeping the connection behind the visible face.

Chippy’s offers three Corten edging systems. The right choice depends on the top edge, rigidity, curves and joining method required for the project.

Original 1.6mm Flat Edge

Our original system has a simple flat top and is the lightest and most flexible of the three. It is a practical choice for straight runs, angles and curved garden lines. The pre-drilled ends overlap at each join, making it straightforward to connect on site.

Safe Edge

Safe Edge is also made from 1.6mm Corten steel, but the top is folded over to create an approximately 10mm-wide rounded edge. The fold adds rigidity and gives the top a softer, more finished feel, making it well suited to lawns, paths and other areas where people regularly pass close to the edging. Joining plates and pegs sit behind the visible face.

Heavy-Duty 3.0mm Flat Edge

Choose the 3.0mm system when you want a thicker, heavier and more rigid flat edge, particularly for long straight runs or prominent borders. The lengths meet with a butt join rather than overlapping and are connected by a joining plate behind the edging. The holes are marked and drilled on site using the supplied template.

All three systems develop the same natural Corten patina, but their components and joining methods are different. The complete ranges are displayed at Chippy’s Outdoor in Clayton, where the top edges and difference in rigidity can be compared in person.

Installing and joining the 3.0mm edging

The Heavy-Duty system installs differently from Chippy’s original 1.6mm Flat Edge. Each length finishes square and meets the next end to end. A joining plate behind the edging supports the butt joint and keeps the front face uninterrupted.

  1. Set out the required landscape line and prepare a narrow trench where needed.
  2. Position the first length at the required height and check the alignment.
  3. Mark the centre of the joining plate and place half behind the end of the first length.
  4. Clamp the plate and edging, then use the supplied template to mark the fixing holes.
  5. Drill the marked holes and fasten the first length to the plate.
  6. Place the second length against the first and align the top edges.
  7. Clamp, mark, drill and fasten the second length to the other half of the plate.
  8. Recheck the line before fixing the edging to the remaining pegs and backfilling.

Keep support pegs clear of the joining plates so they do not interfere with clamping, drilling or fixing.

Corners and cutting

The matching 90-degree corner can be turned to create either an internal or external corner. Connect it with the same rear joining plate, marking template and butt-joint method.

The edging can be cut on site with an appropriate metal-cutting method. Smooth and lightly bevel the cut edge afterwards to remove sharp corners. The 3.0mm profile requires more effort to cut and handle than the 1.6mm Flat Edge system.

What is needed to join two straight lengths?

Allow one matching joining plate for each connection between two straight lengths. Centre the plate behind the butt join, mark the holes with the supplied template and fix both edging lengths to the plate. Joining plates and compatible fixings are selected separately because the required quantity depends on the project layout.

Why does the 3.0mm system use butt joins?

A butt join allows two 3.0mm lengths to meet without doubling the visible steel thickness at the connection. The rear plate supports the joint and helps align the faces while the hardware remains out of sight from the main viewing side.

Does the edging arrive with pre-drilled holes?

No. Hole positions are marked on site with the supplied screw-hole marking template after the adjoining lengths or corner have been aligned and clamped. This gives the installer a consistent fixing pattern without dictating the final joint position before installation.

Which joining plates does it use?

The system uses the 1.6mm joining plates from Chippy’s Safe Edge range. Match the plate to the edging height. The 280mm plate is used with the 300mm edging and sits slightly short of the full height without changing the normal joining method.

Which pegs should I use?

Use Chippy’s 25 × 395mm Corten pegs for the 100mm and 150mm edging. Use the 25 × 500mm pegs for the 300mm edging. Four to five pegs per 3.0m length is a practical starting allowance, adjusted for soil conditions, finished height and the shape of the installation.

Do not position a peg directly behind a butt join. Keep it clear of the joining plate so the components can be clamped, drilled and fixed without interfering with one another.

Can the same corner turn in either direction?

Yes. The matching 90-degree corner can be oriented for an internal or external turn. Corners are available in 100mm, 150mm and 300mm heights and connect with rear joining plates.

Can Heavy-Duty 3.0mm edging form curves?

Yes. Heavy Duty 3.0mm edging can form softer curves, although it is more rigid and requires a broader curve than the 1.6mm Flat Edge system. Choose the 1.6mm Flat Edge where the design relies on tighter or more flowing curves.

Can the edging be cut on site?

Yes. Cut the steel with an appropriate metal-cutting method, then smooth and lightly bevel the cut edge to remove sharp corners. The 3.0mm profile requires more effort to cut than the 1.6mm system.

Is it suitable for retaining soil?

It can separate garden materials and form non-structural raised landscape features, but it is not a structural retaining wall. Use a properly designed retaining system where the project involves substantial soil pressure, major level changes or structural loads.

Is Corten maintenance-free?

It does not require painting to create its characteristic finish. The patina will continue changing, and runoff, surrounding drainage and the build-up of garden material should still be monitored as part of normal landscape care.

Corten is the familiar name used for weathering steel. Outdoors, its surface reacts to repeated moisture and drying, producing the rust-coloured patina that gives the material its characteristic rust appearance.

The edging arrives raw grey rather than pre-finished in a uniform brown. Early orange tones can begin appearing after exposure to the weather, while the deeper and more settled finish develops progressively. Season, sunlight, orientation, moisture and drainage all influence the timing and colour.

The colour will continue changing as the steel responds to its surroundings. Differences between lengths are normal and gradually become part of the finished landscape.

Can the weathering process be encouraged?

Yes. Before installation, place the lengths flat in a suitable outdoor location, keep them separated, wet the surface with a hose, brush it with a broom and allow it to dry. Repeating the wet-and-dry cycle can encourage the first stages of patina development.

This will not create an instant or perfectly uniform finish. The steel will continue responding to its installed environment.

Will the runoff stain nearby surfaces?

It can. Rust-coloured runoff is most noticeable while the first patina develops and may stain porous materials such as concrete, paving and natural stone. Direct drainage away from sensitive surfaces or choose another edging finish where staining would be unacceptable.

3mm Corten Steel Garden Edging...

$39.50 AUD
$39.50 AUD
Sold Out

Size

100mm x 3mm x 3.0m

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For enquires and product information, visit us in-store or speak to a staff member on 03 9755 6811.
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