Birds Mouth Fencing Posts

Build a durable, professional-looking fence with this 1.35m x 100mm x 100mm Birds Mouth Fence Post, specifically designed for traditional birds mouth fencing systems. Also commonly referred to as knee rail, Ascot, or diamond rail fencing, this post is a proven choice for pathways, schools, car parks and more.

Manufactured with a precision V‑cut recessed end, the post is designed to accept either 75mm x 75mm or 100mm x 100mm rails, allowing the rail to slot neatly into place. Held together using our birds mouth straps. This creates a clean, secure joint that helps distribute load evenly and improves the overall strength and appearance of the fence line.

Pressure treated to Use Class 4 (UC4), this birds mouth fence post is protected against rot, decay, and ground contact, making it suitable for long-term outdoor use.

Key Features of Birds Mouth Fencing Posts

• Designed specifically for birds mouth fencing.
• 1.35m long post with 100mm x 100mm profile.
• V-cut recessed end for secure rail location.
• Compatible with 75mm x 75mm or 100mm x 100mm rails.
• Fix rails using birds mouth metal strip.
• Pressure treated to UC4 for in-ground durability and long service life.

Please note: Timber is a natural product. Finish, colour and sizes may vary from illustration and description. While every care is taken to provide you the best material, with it being natural it can move, split, warp, twist, swell and shrink.

*UC4 grade treatment has a life expectancy of 15 years. This is not a guarantee.