Description
Redwood Treated Fence Post 125mm x 100mm x 2.4 m V-Notch – Heavy Duty Timber Fencing
Overview
Traditional closeboard fencing relies on a perfectly integrated, interlocking framework to outlast standard budget fence panels. Our 125mm x 100mm V-Notched Redwood Post provides the ultimate structural foundation for this system. By featuring factory-machined triangular notches, the horizontal arris rails slide directly into the core of the timber structure. This inset design transfers dynamic wind forces away from the fixings and directly into the mass of the heavy-duty post.
By positioning the wider 125mm face perpendicular to your fence line, the rectangular geometry acts as a rigid structural beam. This directional layout completely resists the lateral “sail-force” leverage generated by seasonal storms against solid featheredge runs. Because the notches are cut prior to the high-pressure chemical treatment process, the defensive anti-rot barrier completely coats the recessed internal corners, ensuring no raw wood fibers are left exposed to trapped moisture.
Key Features
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Fast Structural Assembly: Drastically cuts down on-site labor times by removing the need to manually measure, mark, and chisel out rail notches by hand.
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Directional Stability Upgrades: Rectangular profile ensures maximum resistance against high forward and backward wind pressures.
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Anti-Bleed Protection: Advanced industrial treatment processes ensure the anti-rot chemical seal bonds tightly with the wood fibers, eliminating ugly chemical bleeding.
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Natural Weathering Hue: The subtle pale-green preservative tint gently matures over time into a silver-grey weathered tone, which readily accepts exterior timber stains or oils.
Technical Specifications
| Attribute | Specification |
| Product Type | Heavy-Duty V-Notched (Mortised) Closeboard Fencing Post |
| Timber Species | Premium European Redwood (Pinus sylvestris) |
| Dimensions | 125mm x 100mm (Nominal 5″ x 4″) |
| Length | 2.4 Metres (Nominal 8 feet) |
| Notch Configuration | Standard 3x V-Notches (Engineered for traditional triangular arris rails) |
| Treatment Grade | UC4 (User Class 4) – Formulated for Permanent Ground Contact |
| Preservative Type | Tanalith-E (Or equivalent eco-friendly copper triazole) |
| Suitability | High-Exposure Closeboard Fencing, Heavy Perimeter Boundaries |
Trade Installation & Sizing Tip
Pro Tip: To maximize the high wind-resistance of this rectangular notched post, always install it with the wider 125mm face pointing down the line of the fence (perpendicular to the panels), ensuring the V-notches face outward toward the front of your boundary line.
Critical Sizing & End-Grain Rule: To build a stable 1.8m high closeboard boundary, set this 2.4m post roughly 600mm deep into a 300mm wide hole filled with rapid-setting Postcrete. If you trim the top of the post to form a custom weather slope, you must apply an end-grain preservative fluid to the raw wood fibers immediately. Always keep the uncut factory end at the bottom of the hole to protect the base from underground rot.








OLEG (verified owner) –
Awesome timber