Diamond Wood Rail Fences

Diamond Wood Rail Fencing

  • Also known as Knee Rail fencing or Birdsmouth fencing
  • Ideal for use for demarcation or around car parks
  • All timber used throughout is superior quality Jakcure® treated softwood guaranteed for 25 years
  • Galvanised strap for longer life
  • Planed finish


We aim to deliver most orders within 30 days
Due to high demand our lead times may have increased meaning you may have to wait longer for some products to be delivered. We recommend you do not plan your installation date until the product has arrived. We will inform you of the estimated delivery week/ lead time when we have processed your order or for our latest lead times, please call.
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Diamond Rail / Knee Rail Fencing

Posts for diamond / knee rail fencing with birds mouth top, 100 x 100mm section, softwood planed finish. Galvanised strap to secure post to rails with 50mm nails.

Rails for diamond / knee rail fencing are 75 X 75mm nominal section. 2.7m (640600) or 1.8m (640300) long. (posts are set at 1.35m centres)


We have a number of fences used for demarcation, also view the following:

Post & Chain Fencing

Silver Rail Fencing

If you'd like to install this product yourself, take a look at our instructions by clicking the button below:

Installing Diamond Rail Fencing Instructions


Why is it called Birdsmouth fencing?

Birdsmouth post and rail is called so as the posts in which the diamond shaped rail sit into, look like an open birds mouth. 

Delivering an exceptional fence installation service

Approved Installers Network

Our network of Approved Installers are high skilled, carefully selected, reputable fence installers who we trust to install our high quality timber products to the highest installation standards. If you are interested in installation by one of our Approved Installers please click "Add installation to basket" below. We will be in touch shortly after processing your order to discuss installation.

Products in Diamond Wood Rail Fences

Buying multiple products?
Just update the quantities of each item you wish to buy and click 'Add all to basket'
Buying multiple products?
Just update the quantities of each item you wish to buy and click 'Add all to basket'

Related Products

Jacksons Fencing have a large range of related products, all complete with our 25 year guarantee. If you cannot find the item you are looking for, please do not hesitate to call our friendly sales team.

This is Jacksons Fencing

We have developed this short film to showcase our unique processes which go into crafting our timber fencing, garden gates and accessories. It is these processes that allow us to offer our market leading 25 year guarantee and helped to establish our reputation for quality, service and our ability to make every garden beautiful.

Shopping with us

We offer the longest guarantee in the industry for manufactured timber products.

Featherboard Fence Calculator

Enter the run length and height, to calculate the items required:


You will need bays consisting of  posts,  pales,  rails and  Gravelboard(s).

To re-calculate simply change the requirements above.