Timber Path Edging
Timber edging for gravel paths, mulched borders or stepping-stone routes — the quiet detail that turns a patch of gravel into a finished garden path.
What you'll need
Materials
- Edging boards (sleepers, planed or sawn boards), short ground stakes (50×50×450mm typical) at 800–1200mm spacing, stainless or coated screws, weed membrane optional, gravel/mulch fill.
Tools
- Spade, lump hammer, spirit level, tape measure, drill/driver, saw, string line, post-hole digger optional.
Material complexity: Low
One spare sleeper and four spare stakes for a 10m run. Curves waste more — buy extra shorts.
Main risk: Using above-ground (UC3) timber in soil — the edge rots in a few seasons and the gravel escapes.
Cut list
10m straight path, both sides, 100×200mm sleepers. Confirm the route before you buy.
- Sleepers ×10100×200mm × 2000mm — 5 per side. If your merchant only sells 2.4m, buy 10 of those and accept a little overhang or trim
- Stakes ×2650×50mm × 450mm — 13 per side, at about 800mm centres, driven 300mm
- Stainless or coated screws: 5.0×80–90mm, two per stake, from the path side through the sleeper into the stake
- Optional weed membrane under the gravel, cut 200mm wider than the path so it tucks behind the edging
Step-by-step
String the route and walk it
Pin a string line for both edges of a 10m path. Set the width — 900mm is comfortable, 600mm is the minimum, 1200mm if a barrow and a person must pass. Walk it. Move the string until the line looks right from the house, not just on a sketch.
Tip: Curves need more short pieces. Decide that now, before you order ten 2m sleepers.
Set the first sleeper and its stakes
Excavate a shallow, level trench. Sit the first 2000mm sleeper. Drive 50×50×450mm stakes on the path side, 300mm into the ground, and screw through the sleeper into each stake with two 5.0×80–90mm screws. The stakes disappear once the gravel is in.
Watch out: This is UC4 work (timber that sits in soil or stays wet). A fence-board UC3 stamp will not last here.
Run the rest, 13 stakes per side
Butt or scarf the next sleepers, leaving a 5mm movement gap at each joint. Keep the top arris to the string. Plan on 13 stakes per side at about 800mm centres so the edge stays plumb under foot traffic and a loaded barrow.
Tip: Work one side fully, then the other, so the path width stays constant.
Membrane, gravel, and a first walk
Tuck weed membrane behind the edging if you are using it, then fill the path. Walk the run. Re-drive any stake that has lifted. Come back after the first winter and do the same — frost lifts the shorts first.
Tips & traps
- UC3 timber in the soil — it looks fine for two years, then fails in a line.
- Stakes on the show face, so you see a row of posts.
- Tight butt joints with no 5mm gap — long runs shove themselves out of line as they move.
- Trying to bend a 2m sleeper around a curve.
Planning & timber detail
Why build this?
Path edging is the quiet detail that turns a lawn with a strip of gravel into a finished garden. It holds the gravel, gives you a mowing line, and makes the whole space look intentional. Quick to build, decades of impact.
Where it works best
Almost anywhere. Curved paths can use shorter board lengths with mitred or scarfed joints. Avoid trying to bend boards through tight curves — saw a series of shorter sections instead.
Planning notes
Mark the path with string and stakes before buying anything — most people misjudge curves and widths from a plan. Walk the route a few times to confirm.
Typical sizes
Default 10m straight run, both sides: ten 2000mm sleepers (100×200mm) and 26 stakes (50×50×450mm) at about 800mm centres.
Sleepers can sit on edge (taller, thinner line) or flat (wider, lower). Boards 47×150mm or 47×100mm are the lighter alternative.
Default dimensions
Default run: 10m straight, both sides.
Sleepers: 100×200mm × 2000mm, 5 per side.
Stakes: 50×50×450mm, 13 per side at 800mm centres.
Path width: 900mm comfortable; 600mm minimum; 1200mm for barrow plus walker.
Design variants
Sleeper edge (this page) — 100×200mm, oak or treated. The quiet, heavy line.
Board edge — 47×150mm or 47×100mm on the same stake pattern. Lighter, cheaper, more joints.
Curve — do not bend a sleeper. Use 300–600mm sections with mitred or scarfed joints.
Suitable timber options
Oak sleepers for visible feature paths (kitchen garden, front path). Treated redwood boards for utility paths and longer runs. Larch for a halfway point with slightly better durability than treated redwood.
Fixing and finishing
Drive ground stakes behind the visible edge (on the path side, hidden by gravel) so the line reads as clean timber. Screw the edging to the stake from behind with 5.0×80–90mm stainless or coated screws, two per stake. Stake spacing 800mm on a 10m run gives 13 stakes per side and keeps the edge plumb under feet and barrows.
For curved paths, use shorter board sections (300–600mm) and mitre or scarf the joints. For sleeper paths, the sleeper sits on the ground and is fixed only with ground stakes — no foundation needed beyond a level compacted base.
Maintenance
Walk the run annually and re-drive any ground stakes that have lifted. Replace individual boards as needed — modular by design.
Re-level any sleeper that sinks or lifts after the first winter. A few millimetres of movement is normal; major shifts mean the base wasn't compacted enough.
Timber behaviour
Durability
UC4 is essential — this timber sits in soil with constant moisture cycling. UC4 means timber that sits in soil or stays wet. UC3 (timber kept off the soil) will rot here within 3–5 years. Oak sleepers can be used untreated because the species itself is durable in ground contact; treated softwood must be a genuine UC4 stamp, not a fence-board treatment.
Movement
Long edging runs expand and contract; allow small (5mm) expansion gaps at scarfed joints rather than tight butts.
Go deeper
Related yards
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