Incised UC4 Green Treated Wooden Fence Post

Incised UC4 Green Treated Wooden Fence Post is engineered for long-term performance in applications where the timber remains in permanent ground contact. The UC4 preservative treatment penetrates deep into the softwood, giving enhanced resistance to rot, fungal decay and soil moisture. Machine incising improves preservative uptake, ensuring the post performs more reliably than standard UC3-treated timber.

Its rigid square profile provides dependable structural support for domestic fencing, gravel-board setups, trellis sections and gate installations. The green treatment finish blends naturally into garden settings and clearly indicates suitability for outdoor, in-ground use. The post stays stable in high-wind or exposed gardens, maintaining alignment and reducing long-term maintenance needs.

The softwood construction remains easy to cut, drill and fix onsite, making installation straightforward for both DIY and trade users. The square-cut top accepts post caps or finials for added protection against end-grain moisture. This combination of UC4 treatment, enhanced penetration and practical handling makes it a dependable option for ground-contact fencing systems.

Installation Guide:

• Excavate the post hole and embed the post to the required depth for fence height and wind exposure
• Set the post using post-mix or concrete, ensuring plumb alignment before curing
• Seal any cut or drilled faces with an appropriate preservative to maintain UC4 performance
• Fit post caps or finials to protect the square-cut top from end-grain moisture ingress
• Backfill firmly and check alignment after initial settling

Fire Rating for UC4 Treated Timber

UC4 softwood fence posts are combustible, because they are natural timber.

This means:

• They do not have a formal fire rating like concrete or steel
• They are not fire-resistant
• They cannot be used in any fire-rated wall or fire-resistant structural system
• Preservative treatment (UC4) improves durability, not fire performance