Overview

Standard 75mm or 100mm posts are perfectly fine for everyday, low-exposure fence panels. However, when your design introduces massive lateral forces—such as hanging heavy side gates, anchoring high-exposure corner runs, or retaining soil tiers—standard posts will slowly yield, warp, or snap under the pressure. Our 150mm x 150mm Redwood Square Post provides the ultimate heavy-duty structural upgrade.

As shown in the product profile, this post features a beautifully uniform, square-cut configuration milled from premium European Redwood (Pinus sylvestris). Because the raw timber undergoes an intense hydraulic vacuum treatment process, the advanced anti-rot copper triazole solution is driven deep into the heartwood matrix. This creates a highly uniform, protective chemical jacket that completely shields the critical ground-line junction—the high-oxygen moisture zone where subterranean wood is most vulnerable to rotting out.

Key Features

• Premium Boundary Structural Anchor: Provides a substantial visual and structural statement, anchoring heavy-duty bespoke closeboard frameworks effortlessly.

• Significantly Limits Timber Checking: The high-density fiber structure of slow-grown redwood shrinks and expands uniformly, significantly minimizing the large, deep splits common in low-grade whitewoods.

• Multi-Application Utility: An incredibly versatile structural component, ideal for supporting garden pergolas, timber carports, heavy deck corners, and low retaining wall systems.

• Natural Landscape Aesthetics: The subtle pale-green preservative tint fades smoothly over time under UV exposure into a warm honey-brown, before settling into a silver-grey weathered look. It readily accepts all exterior wood stains or paints.

Technical Specifications

Trade Installation & Ground Anchoring Advice

Pro Tip: Sinking a 150mm square structural post requires a substantial foundation footprint to properly anchor its weight capacity and resist wind leverage.

The Professional Method: For a standard installation, dig a hole measuring at least 350mm to 400mm wide by a minimum depth of 600mm to 750mm deep. Drop a 2-inch layer of gravel or drainage ballast at the bottom of the hole to allow moisture to drain cleanly away from the base-cut end-grain. Position and brace the post completely plumb. Fill the void using 2 to 3 bags of rapid-setting Blue Circle Postcrete, layering it with water according to instructions. Use a trowel to taper the top of the concrete wet mix into a smooth, downward-facing dome above ground level, forcing rainwater to shed completely away from the timber base.

The post Redwood Treated Post 150mm x 150mm x 2.4 m – Heavy Duty Timber Fencing first appeared on Wooden Gates for Bucks, Berks, Herts & Oxon.