3.6m x 75 x 75mm Knee Rail Fencing Top Rail Kit

3.6m x 75 x 75mm Knee Rail Fencing Top Rail Kit

Knee Rail Fencing is a simple and durable way to define boundaries while keeping sightlines clear. Using the traditional birdsmouth jointing technique, horizontal timber rails are securely fitted to vertical posts to create a strong and attractive structure.

Please note: Timber Knee Rail Fencing does not meet the specifications for highway use.

Strong Birdsmouth Construction

The birdsmouth joint features a precisely cut notch in the end of the timber rail, allowing it to sit securely onto the vertical post. This maximises the contact area between the two components, creating a strong and stable connection.

Knee Rail Fencing is typically installed at around 450mm or 600mm high, making it easy to step over while clearly defining boundaries and discouraging access to lawns, flower beds and designated parking areas.

Durable Tanalith E Timber

This 3.6m top rail is manufactured from 75 x 75mm Norway Spruce timber and treated with Tanalith E Green, a copper-based treatment designed to improve resistance to decay and outdoor conditions. The timber is supplied by a reputable UK sawmill, with the Norway Spruce predominantly felled in North Wales. FSC certification is available on request. As the treated timber weathers naturally, its colour will change from pale green to honey and eventually to a silvery grey.

Complete Knee Rail Fencing Kit

The 75 x 75mm top rail can be combined with matching:

• Birdsmouth posts
• Galvanised fencing straps
• Galvanised nails
• 1.8m or 3.6m top rails

A 100 x 100mm top rail is also available if required.

For the 75 x 75mm rail, use either the V-style strap or Shoe-style strap.

The Bishop's Hat style strap is designed for the 100 x 100mm rail due to the overhang on the Birdsmouth post.

Ideal for Public Spaces

Knee Rail Fencing provides a cost-effective way to organise and define outdoor areas without creating a restrictive barrier.

It is ideal for:

• Car parks
• Pathways and walkways
• Parks and public spaces
• Lawns and flower beds
• Designated parking areas
• Pedestrian areas

The low-level design provides clear boundary definition while maintaining visibility and easy pedestrian movement.

In-Ground Installation

This fencing is supplied as a dig-in system and is designed for installation into the ground. Posts should be installed at approximately 1.8m centres and secured using Post Mix.

For a typical 450–600mm high installation, approximately half of the post length should be buried in the ground. A minimum of two bags of post mix per post is recommended. Although the timber is pressure treated, additional wood treatment, particularly on exposed ends, is recommended to provide extra protection and help extend the lifespan of the fencing.

Complete Your Knee Rail Fencing

Browse the full Timber Knee Rail Fencing range to find the rails, posts, straps and fixings needed for your installation.

Contact Us

Need help choosing the right Knee Rail Fencing components? Contact our friendly team on 01283 512 111, email sales@firstfence.co.uk or speak to us via online chat for advice and support.