Wooden Fence Posts for Garden Fencing

Shop wooden fence posts at Clarke Fencing for new garden boundaries, replacement posts and timber fencing projects. Our square timber posts provide fixing surfaces for fence panels, rails and brackets, making them suitable for a range of installations, including lap panels, closeboard fencing and picket fences.

Choose from 75mm x 75mm and 100mm x 100mm posts in brown or green pressure-treated finishes. Lengths range from 1.5m to 3.0m across selected sizes, giving you options for low garden fences, taller boundaries and installations requiring additional burial depth. Our 100mm x 100mm range is also kiln dried.

These wooden fence posts are pressure treated to UC4 for ground-contact applications. Choose the post dimensions around the finished fence height, panel weight and site conditions, including exposure to wind. Remember to include gravel boards and any trellis toppers when calculating the overall height.

Complete your installation with suitable panel brackets and fixing clips. Order wooden fence posts online for collection from our Stowmarket yard in Suffolk or delivery across East Anglia, including Norfolk, Essex and Cambridgeshire.

Wooden Fence Posts FAQs

Should I choose 75mm or 100mm wooden fence posts?

A 75mm x 75mm post is generally suited to lighter, lower fencing, while a 100mm x 100mm post provides a more substantial section for taller panels and heavier fencing. The right choice also depends on post spacing, wind exposure and the fencing design. For gates, browse our dedicated gate posts and choose a size suited to the gate’s weight and width.

What length fence post do I need for a 6ft fence?

Calculate the total height above ground, then add the required burial depth. A 2.4m post allows for 1.8m above ground and 600mm below ground.

If you are placing a 1.8m panel above a 150mm gravel board, the combined height is 1.95m. Adding 600mm below ground gives a required length of 2.55m, so a 2.7m post provides the additional length. Adjust your choice if the site requires deeper installation or a different post-top position.

How deep should wooden fence posts be installed?

Around 600mm is a common starting point for standard garden fencing, but the required depth depends on the fence height, ground conditions and exposure. Taller fencing, soft ground and posts carrying additional loads may require deeper foundations. Set posts upright and support them securely while the concrete or postmix sets.

What does UC4 treatment mean?

UC4 identifies preservative treatment suitable for timber in ground contact or providing exterior structural support. It helps protect the wood against decay in these conditions. Correct installation remains important, and UC4 treatment does not make a post permanently rot-proof.

What is the difference between brown and green fence posts?

Both finishes in this range are UC4 pressure treated. The main choice is appearance: brown posts coordinate with brown fencing, while green-treated posts have a lighter, natural timber appearance. Colour alone does not indicate the level of preservative protection.

Can I cut wooden fence posts to length?

Choose the correct length wherever possible. If shortening is necessary, cut from the top and keep the original treated end in the ground. Apply a suitable end-grain preservative to exposed cuts, following the treatment manufacturer’s instructions. Brush-on preservative does not recreate the original industrial pressure treatment.

Do you deliver wooden fence posts?

Yes. We deliver across East Anglia, and collection is available from our Stowmarket yard. Visit our delivery information page for delivery areas and ordering arrangements.