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Australia's Retaining Wall Specialists
Quality concrete sleepers & steel posts delivered Australia-wide
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Concrete under-fence plinths solve one of Perth's most common boundary fencing problems — ground movement, soil erosion, and gaps beneath timber or Colorbond fences caused by WA's reactive clay soils and sandy coastal profiles. Retaining Walls Direct supplies 50mm concrete under-fence plinths to Perth homeowners, fencing contractors, and builders who need a durable, low-maintenance solution delivered direct to site.
Our concrete plinths are manufactured to match our standard concrete sleeper range — available in Lonsdale and Blackwood finishes, 2000mm long and 200mm wide, in 50mm thickness. They sit at ground level beneath your fence line, preventing soil wash-out, deterring pests, and eliminating the unsightly gap that develops as Perth's sandy soils shift seasonally.
Under-fence plinths are particularly effective in Perth's coastal suburbs where Bassendean sand erodes quickly beneath fence lines, and in the eastern suburbs and hills where reactive clay causes ground movement that creates uneven gaps. They're also widely used along boundary fences adjacent to retaining walls to create a clean, finished transition between wall and fence.
Plinths slot directly into the same galvanised steel H-beam and C-channel posts used for concrete sleeper retaining walls — no additional hardware required. Standard post spacing of 1.8–2.0m suits most Perth residential fence lines. For boundary fences near structures or on reactive soils, confirm post embedment depth with your installer or engineer.
Boundary fencing in WA is governed by the Dividing Fences Act 1961. Fences over 1.8m or those incorporating retaining elements may require council approval — check with your local Perth LGA before installation. See our Engineering & Council Rules guide for further guidance.
Delivered by flat-bed truck to all Perth metro suburbs and regional WA. Plinths are heavy — confirm site access and unloading arrangements before ordering. Request a free Perth delivery quote for your postcode.