Concrete Under Fence Plinths

Concrete under-fence plinths are 50mm concrete strips that run beneath fence lines, retaining garden beds and soil while keeping timber fences off the ground. Steel-reinforced concrete stops rot at the fence base without rebuilding the fence itself.

They install along new or existing fences. Match them with concrete sleepers for larger height changes, or ask us via contact us.

Concrete under fence plinths for retaining walls and fencing systems

What a plinth actually does

An under-fence plinth solves two problems at once. It retains shallow soil differences, up to roughly the plinth height, so garden beds and lawns can sit higher on one side of the fence. It also lifts timber palings and rails clear of ground contact, which is where fences rot first. A 50mm concrete plinth does not decay, does not feed termites and does not need replacing when the fence eventually does.

Plinths versus sleeper walls

Plinths suit small soil height differences along a fence line. Once the retained height grows beyond what a plinth handles, the job becomes a retaining wall: steel-reinforced concrete sleepers in galvanised steel posts, with fencing mounted above using our galvanised fence brackets. If you are unsure which side of that line your project sits on, the retaining wall calculator prices the sleeper option in minutes and our team can advise on the plinth option.

Ordering and collection

Concrete products in Victoria are collected from Dandenong South and Officer, with delivery available on external transport to forklift-accessible sites. Melbourne metro small loads start from $160 delivered. National customers are supplied through our Brisbane, Sydney and Adelaide network.

Do plinths work under Colorbond fences?

Yes. Plinths run under any fence type. Under steel fencing they retain soil and mulch; under timber fencing they add the extra benefit of separating palings from damp ground, which extends the life of the fence considerably.

Can I install plinths under an existing fence?

Usually, yes. Plinths are laid along the fence line at ground level, so most existing fences can have them retrofitted where there is clearance beneath the bottom rail. Check clearance before ordering lengths.