Timber Knee Rail Fencing stands as a robust timber-based structure crafted using the 'birdsmouth' jointing technique. This fencing style typically features securely positioned horizontal rails supported by vertical posts, also recognised within the industry as birdsmouth, ascot or diamond fencing.
The term 'Knee Rail' finds its origin in its design, strategically placed at a low height around knee level, serving to demarcate without impeding sightlines. The birdsmouth joint, a precise notch or cut at the end of the timber fitting tightly onto the post, significantly bolsters structural integrity by maximising the contact area between the horizontal rails and the vertical posts. Its name stems from its likeness to the open mouth of a hungry baby bird awaiting food.
Durable, decay-resistant timber predominantly shapes this fencing style, rendering it particularly suitable for outdoor installations. The system consists of top rails, birdsmouth posts and assembly involves the use of galvanised straps, available as a straight or 'Bishop's Hat' style and nails, ensuring a secure and lasting connection between the timber posts and rails. This is a dig in format.
Knee Rail Fencing's versatility allows for application across diverse settings such as car parks, pathways and walkways. Although easy to step over, it efficiently defines boundaries, discourages trespassing on grass or flower beds, and manages designated parking spaces. Its cost-effectiveness makes it ideal for public settings where stringent security measures aren't paramount.
The 1.8m long timber top rails are specifically crafted for knee rail fencing. Constructed from Tanalith E Green-treated timber, these top rails measure 1800mm in length and feature a 75 x 75mm section. A 100 x 100mm version and a 3.6m long version are also available, as are our premium knee rail fencing straps and birdsmouth posts, meticulously designed for knee rail style fencing. The posts undergo thorough pressure treatment with Tanalith E Green, a copper-based biocide product ideal for environmentally sensitive applications. When exposed to the outdoors, the initially pale green timber gracefully transitions into a beautiful honey colour before settling into a silvery grey hue. This timber knee rail fencing is supplied to First Fence by a reputable UK timber saw mill, produced from Norway Spruce and felled predominantly from North Wales (FSC certification is available upon request).
Designed for in-ground installation, they require Post Mix to ensure stability and durability. It is recommended the posts are installed at 1.8m post centre intervals. Knee Rail Fencing is typically 450 or 600mm high so the recommendation is to dig half the length of the post into the ground. A minimum of 2 bags of Post Mix per post is suggested.
While the timber posts undergo initial treatment, additional wood treatment, especially on the ends, is recommended to enhance their resilience and prolong their lifespan.
For inquiries about First Fence products or if you require assistance, our knowledgeable and friendly sales team is readily available. You can reach out to them by calling 01283 512111 or utilising the online chat tool for swift and informative assistance.