100mm Treated Fence Posts (4″x4″) 15 Year Anti-Rot


100mm square treated fence posts (4″ x 4″). Fence posts are incised and cut from softwood. Pressure treated for longer life and UC4 class. A 15 year anti-rot service life and warranty now available on fence posts upon online registration.

Select between different lengths of posts for a price. Add to cart and view cart to calculate postage. See below for full description.



100mm Treated Fence PostsTanalith E Pressure treated timber

100mm square treated fence posts (4″ x 4″) are incised and pressure treated. A 15 year anti-rot warranty available upon online registration. Posts are UC4 graded therefore make suitable for contact in the ground.
Available in various lengths. Use the drop-down bar to select length and adjust quantity.

We recommend concreting posts into the ground at a depth of 600mm (2ft).

Our posts are cut from pine or larch specie softwoods and are pressure treated with tanalith E to ensure maximum life. Incised posts now offer a 15 year anti-rot warranty with online registration. Giving you peace of mind for a fence post that lasts.

All other fencing components can be found in our fencing category.

Local Trade and DIY collections welcome from our trade counter in Swindon Wiltshire. View your basket for UK Delivery options.

How To Register Your Fence Post Warranty

View ECC flyer for instruction on how to register your 15 year fence post warranty. ECC 15 year Incised Warranty Booklet 2020.

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Shipping & Delivery


Lead times are subject to availability. Due to current shortages, expect delays. Many products are manufactured to order and advise estimated lead times in the short product description above.

Fencing kits & components / 2 - 5 weeks (Concrete kits will be delayed for the foreseeable / Try the new Dura Post range instead

Garden Gates / 2 - 3 weeks (premium range gates) 5 - 7 weeks

5 Bar Gates / 3 - 5 weeks (Iroko Hardwood gates & All Turned Heel Gates 7 - 12 weeks)

Decking / Garden Products / 1 - 3 weeks

Fixings / Tools / Ironmongery / 3 - 5 days

Framing & Cladding / 1 - 3 weeks

Orders containing multiple products will be dispatched together, all lead times should be considered. Special lead times on specific products are stated in products short description. All lead times are subject to availability. A delivery date will be supplied via email after the order has been placed.


You are welcome to come visit us if you wish to collect or discuss products. Many of our products are manufactured to order so please do not assume goods are ready if available to purchase online. Goods ordered online will be allocated and (or) manufactured, then an email will be sent to confirm a 'ready from' date to collect.

How Much is Delivery?

Add goods to basket, view basket and click the ‘Calculate Postage’ button. Enter full post code for a price. The price is updated as goods are added or removed from your basket.