Treated Pine Fence Rails, Capping, Plinth, and Brackets
The complete guide to treated pine fence rails, capping, plinth boards, and fence brackets — what each component does and how to use them together for a professional result.
A well-built timber paling fence is more than just palings nailed to posts. The rails, capping, plinth, and brackets are what give the fence its structure, longevity, and finished appearance. At Wallan Fencing and Timber Supply, we stock the full range of treated pine fence components — here's how each one works and how to use them together.
Treated Pine Fence Rails (75×50mm)
Fence rails are the horizontal members that run between posts and support the palings. The standard size for residential paling fences is 75×50mm treated pine, available in 4.8m, 5.4m, and 6.0m lengths.
How Many Rails Do You Need?
A standard 1.8m paling fence uses two rails — one at approximately 300mm from the top and one at approximately 300mm from the bottom. A 2.1m fence typically uses three rails.
To calculate rail requirements:
- Measure the total fence run
- Divide by rail length (4.8m, 5.4m, or 6.0m) to get the number of rails per row
- Multiply by the number of rows (2 for 1.8m fence, 3 for 2.1m)
- Add 10% for waste
Rail Pricing (GST inclusive)
- 75×50mm × 4.8m: $14.15
- 75×50mm × 5.4m: $15.80
- 75×50mm × 6.0m: $21.10
Installation Tips
Fix rails to posts using galvanised joist hangers or by notching the post and face-nailing. Ensure rails are level — a string line along the top of the posts is the easiest way to check. Stagger rail joins so they don't all fall on the same post.
Fence Capping
Fence capping is a timber board fixed to the top of the fence, covering the top edges of the palings and giving the fence a neat, finished appearance. It also protects the top of the palings from water ingress, which is one of the main causes of premature rot.
Capping is typically 75×25mm or 100×25mm treated pine, fixed with galvanised nails or screws through the top of the palings. It should overhang the palings slightly on both sides to shed water away from the fence.
Why Capping Matters
Without capping, the top edges of the palings are exposed end grain — the most vulnerable part of the timber. Water soaks into end grain much faster than into the face of the board, and this is where rot typically starts. A well-fitted capping board can add years to the life of your fence.
Fence Plinth (150×25mm)
A fence plinth (also called a kickboard or bottom board) is a horizontal board fixed at the base of the fence, between the bottom rail and the ground. It serves several purposes:
- Prevents rot: Keeps the bottom of the palings off the ground, preventing moisture wicking up into the timber
- Deters pests: Closes the gap at the base of the fence, reducing access for rabbits, dogs, and other animals
- Improves appearance: Gives the fence a clean, finished look at ground level
Plinth Sizing
We stock treated pine fence plinth in 150×25mm × 5.4m lengths. The plinth is typically fixed to the bottom rail and sits just above ground level — leave a 10–20mm gap between the plinth and the ground to allow airflow and prevent moisture accumulation.
Plinth pricing: Available at our Wallan yard — ask for current pricing.
Timber Fence Brackets ($16.75 each, GST inclusive)
Timber fence brackets are galvanised steel brackets used to fix rails to posts without the need for notching or complex joinery. They're quick to install, strong, and keep the rail connection tight over time.
Types of Fence Brackets
- Rail bracket: Fixes the rail to the face of the post at the correct height
- End bracket: Used at the end of a rail run where the rail meets a post at 90°
- Adjustable bracket: Allows the rail to be set at different heights
Why Use Brackets?
Brackets are faster to install than notched joints and provide a more consistent result. They're particularly useful when posts are not perfectly aligned, as the bracket can compensate for minor variations. They also make it easier to replace a damaged rail in the future.
Buying Fence Components in Wallan
We stock treated pine rails, capping, plinth, and fence brackets at our yard at 22 Commercial Drive, Wallan. Available for pickup Monday to Friday 7am–4pm and Saturday 7am–1pm. We deliver across Mitchell Shire and surrounding areas.
Call us on 0431 193 102 or add components to your quote cart online.
Frequently Asked Questions
What size rails do I need for a 1.8m fence? 75×50mm rails are standard for residential paling fences. Use two rails for a 1.8m fence, three for a 2.1m fence.
Do I need capping on my fence? Capping is not structurally required, but it significantly extends the life of the fence by protecting the top of the palings from water. We strongly recommend it.
How do I fix the plinth to the fence? Fix the plinth to the bottom rail using galvanised nails or screws. The plinth should sit just above ground level — leave a 10–20mm gap for airflow.
Are fence brackets strong enough for a full fence? Yes — galvanised fence brackets are rated for residential fencing loads. Use the correct bracket for the rail size and follow the manufacturer's fixing instructions.
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