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Kensington concrete sleepers are steel-reinforced (40–50 MPa) retaining-wall sleepers with a refined, classic finish for premium residential walls. 200mm high in 80 and 100mm thicknesses and 1800–2400mm lengths, they stack horizontally between galvanised steel posts. Australian-made, low-maintenance, delivered Australia-wide by Retaining Walls Direct.
Written and product-checked by the Retaining Walls Direct team — supplying concrete sleeper retaining walls across Australia. Last updated: June 2026.
The Kensington concrete sleeper is an understated, elegant choice for traditional, federation and classic-contemporary homes — a timeless finish that won't date, with the strength and zero-maintenance performance of steel-reinforced concrete. Built to the principles of AS 4678 Earth-retaining structures.
Thickness: 80mm suits standard residential walls; 100mm is the heavier-duty option for taller walls or wider post spacing. Length: longer sleepers mean fewer posts but a higher load per post. Lengths shown are the distance between post centres (post spacing) — the actual sleeper length is approximately 10–15mm less, so it seats correctly into the steel posts at each end. Each course is 200mm high, so a wall needs about 5 sleepers per metre of height, per bay — use the retaining wall calculator or the concrete sleeper buying guide.
| Finish | Kensington — refined classic |
|---|---|
| Height | 200mm |
| Thicknesses | 80mm · 100mm |
| Lengths (post centres) | 1800 · 2000 · 2400mm |
| Actual sleeper length | Approx. 10–15mm less than post-centre size |
| Strength | 40 MPa standard / 50 MPa heavy duty |
| Reinforcement | Steel reinforced |
| Brand | Retaining Walls Direct (Australian-made) |
| Compliance | AS 4678-2002 Earth-retaining structures |
Unlike timber, Kensington concrete sleepers won't rot, warp, split or attract termites, need no oiling or painting, and typically outlast timber several times over — a higher upfront price but lower cost over the life of the wall.
Pair with galvanised steel posts — C-channel for walls under 1.0m, H-beam for taller walls or clay (see the steel post sizing guide). Finish with caps, brackets & hardware and drainage — ag pipe, geo matting, or a drainage kit. See How to build a concrete sleeper retaining wall.
Water behind a wall is the number-one cause of failure — always plan drainage (drainage guide). Walls over 1.0m or near boundaries/driveways/pools generally need engineering and council approval (engineered walls over 1 metre).
Send your postcode and quantities for a freight quote, or contact the team.
What does the Kensington finish look like?
A refined, classic finish — understated and timeless, suited to traditional and federation homes.
What sizes does it come in?
200mm high, in 80/100mm thicknesses and 1800/2000/2400mm lengths.
What size are these sleepers really?
The stated length is the distance between post centres, not the sleeper's physical length. The actual sleeper is approximately 10–15mm shorter than the stated size.
How strong is it?
40 MPa standard, 50 MPa heavy-duty available. Steel reinforced, AS 4678 compliant.
Which posts do I need?
C-channel for low walls, H-beam for taller walls or clay — see the steel post range.
Do I need council approval?
Walls under ~1m are often exempt; taller, boundary or driveway walls usually need approval and engineering.
Can you deliver to me?
We deliver across most of Australia. Send your postcode and quantities for a freight estimate.
