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The Lonsdale concrete under-fence plinth (2340×200×50mm) closes the gap beneath Colorbond and timber fences — keeping pets and soil in, weeds and erosion out, and protecting fences on reactive clay sites. In Natural and Charcoal. Australian-made, delivered Australia-wide by Retaining Walls Direct.
Written and product-checked by the Retaining Walls Direct team — supplying concrete retaining wall and fencing products across Australia. Last updated: June 2026.
An under-fence plinth is a slim concrete strip that sits at the base of a fence (or on top of a low retaining wall) to seal the gap to the ground. The Lonsdale plinth suits Colorbond steel and timber paling fences, and is especially useful on reactive clay where ground movement can leave gaps under a fence line.
| Size | 2340mm (L) × 200mm (H) × 50mm (thick) |
|---|---|
| Finish | Lonsdale — Natural or Charcoal |
| Use | Under Colorbond & timber fences; reactive clay sites; top of low walls |
| Brand | Retaining Walls Direct (Australian-made) |
Plinths slot between fence posts or sit on top of a wall. Browse brackets & fixings, concrete sleepers and steel posts for the full retaining wall and fence system.
Send your postcode and quantities for a freight quote, or contact the team.
What's an under-fence plinth for?
It closes the gap between the bottom of a fence and the ground — keeping pets/soil in and weeds/erosion out.
What size and colours?
2340×200×50mm, in Natural and Charcoal.
Will it suit my Colorbond fence?
Yes — it's designed for Colorbond steel and timber paling fences.
Can you deliver to me?
We deliver across most of Australia. Send your postcode and quantities for a freight estimate.
