Timber Knee Rail Fencing

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What is timber knee rail fencing?
Around car parks and retail areas

Timber knee rail fencing, also known as birdsmouth fencing and diamond rail fencing, is a low-cost and unobtrusive type of wooden rail fencing for boundary demarcation. Being low enough to step over, it provides no perimeter security function. We offer knee rail fencing in a variety of materials, but our timber knee rail fencing is particularly popular for use at schools, around car parks, alongside footpaths, and at sports fields and play areas. It acts as a strong deterrent to drivers who might otherwise stray from roadways and parking areas, as well as discouraging pedestrians from walking on planted borders or lawned areas.

Unlike other types, timber knee rail fencing benefits from a natural aesthetic that is often sought by architects and specifiers.

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What are the key features of timber knee rail fencing?

Our standard timber knee rail fences are constructed on-site using 140 x 140 mm posts with birdsmouth tops that support 100 x 100 mm rails. Posts are usually secured in the ground using Postfix concrete and the horizontal rails are attached to the posts with galvanised steel birdsmouth straps and galvanised nails. Heights are normally either 450 or 600 mm and rail lengths are up to 2.4/1.8m.





      • Boundary Demarcation
      • Car Parks
      • Retail Areas


      450/600mm100mm x 100mm100mm x 1000mmMetal StrapPressure Treated

      Timber knee rail is excellent for straight runs, while curved runs can be constructed by careful cutting of the posts and rails. Alternatively, two posts can be installed adjacent to each other with their birdsmouth v-cuts at appropriate angles to support the rails. Timber knee rail fencing benefits from a very simple design and is constructed on-site, so it can easily be built to follow inclines or undulating terrain. In any event, timber knee rail fencing is quick to install.

      We use only pressure-treated timber from sustainable UK supplies. The end result is a long-lasting fence that requires minimal maintenance, yet it can easily be repaired should the need arise. Thanks to the high-quality timber treatment and galvanised fixings, we are able to provide a 25-year guarantee.

      If you require timber knee rail fences to a different design than the usual diamond rail format, talk to us about your requirements because we can design, manufacture and install bespoke timber knee rail fencing to meet your needs, working from detailed drawings or rough sketches.

      Our work

      We have been in the fencing business for more than 100 years and our firm, which is still family-owned and family-run, can trace its roots back to 1740. We, therefore, have the experience and expertise to meet your needs for timber knee rail fencing.

      Our installation teams are employed by us, not sub-contractors, so we maintain complete control over the quality and timing of the installation. Furthermore, we have a number of accreditations so you can be confident that we will adhere to the highest standards of health and safety and workmanship while we are on your site.

      Find out more
      If you need timber knee rail fencing, download our literature or contact us to discuss your requirements.

      Other types of knee rail fencing

      Timber knee rail fencing is extremely versatile. Nevertheless, there are some applications for which our other types of knee rail are more appropriate – namely recycled plastic knee rail fencing and steel knee rail fencing. These can be better if, for example, you want a zero-maintenance option or something that is sufficiently robust to withstand occasional nudges by vehicles.

      Request a quote
      or call us on 0800 2944177