Description
Redwood Treated Fence Post 125mm x 100mm x 2.4 m Blank – Heavy Duty Timber Fencing
Overview
In high-exposure wind tunnels or when supporting heavy, solid-board wooden fencing, standard square posts can bow under dynamic load forces. Our 125mm x 100mm (5″ x 4″) Blank Redwood Post provides the offset engineering stability required for demanding landscapes. By positioning the wider 125mm face perpendicular to your fence line, the post acts as a rigid structural beam that completely resists the lateral “sail-force” leverage generated by seasonal storms.
Because this is a completely blank, unnotched post, it is highly favored by professional contractors and fencing specialists. You aren’t locked into fixed panel heights or pre-routed positions. Instead, you can comfortably stagger your rails across undulating terrain, frame up uneven boundary corners, or seamlessly mount heavy-duty gate hinges. Its open cell matrix absorbs preservative chemicals deep into the heartwood core, ensuring your structural anchors won’t snap at ground level.
Key Features
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Directional Stability Upgrades: Rectangular profile provides targeted structural resistance against heavy forward and backward wind pressures.
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Bespoke Adaptability: The unnotched finish makes it incredibly versatile—easily convert it into a corner post, a robust end post, or a heavy-duty side gate anchor on-site.
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Anti-Bleed Protection: Advanced industrial treatment processes ensure the anti-rot chemical seal bonds perfectly 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 Sawn Blank (Unnotched) Fencing Post |
| Timber Species | Premium European Redwood (Pinus sylvestris) |
| Dimensions | 125mm x 100mm (Nominal 5″ x 4″) |
| Length | 2.4 Metres (Nominal 8 feet) |
| 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 Pedestrian Gates, Corner & End Anchors |
Trade Installation & Sizing Tip
Pro Tip: To maximize the high wind-resistance of this rectangular post, always install it with the wider 125mm face pointing down the line of the fence (perpendicular to the panels). This alignment uses the post’s maximum structural depth to fight wind leverage.
Critical End-Grain Rule: To build a stable 1.8m high boundary, set this 2.4m post roughly 600mm deep into a 300mm wide hole filled with rapid-setting Postcrete. If you cut the top of the post to form a weather-shedding slope or point, 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.







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