Treated Fence Post 75mm x 75mm | UC4 - Longer Life Treatment
Our UC4 fence posts are a great solution for those looking to upgrade on ordinary treated posts without swapping to concrete fence posts. We supply these 75mm square posts in a variety of lengths. We supply each post either with or without a spuare fence post cap (please select from the drop-down menu) which adds a nice finishing touch to the post as well as stopping water sitting directly on the post, which over the years can eventually start to rot the timber.
Square post cap (optional extra)
Are these fence posts suitable for all types of fence panel?
We would recommend these posts when installing Lap panels, our Milano or Harmony Panels. However, if you are installing closeboard panels then we would strongly advise you to use 100mm x 100mm fence posts as the panels are considerably heavier, and so need a slightly thicker fence post to hold them.
What length fence post should I buy?
The general rule is always buy a fence post which is around 2ft longer than the panels you are installing. In most cases 2 feet (or 600mm) in the ground is enough to hold a fence panel without issues, it's rarely a good idea to have less post depth under the ground, but in areas where the ground is very soft, or if your fence line is in exposed areas which are likely to get the full brunt of high winds (ie. a property on a hillside) then it can sometimes be advisable to have 3ft (900mm) in the ground.
Fence Post Size Guide:
What is UC4 treatment?
UC4 (user class 4) is the category or specification to which the timber is treated. This is a far superior class of treatment, which carries a 15-year life expectancy. The process starts with the type of timber being selected. Rather than spruce, these posts are redwood. The reason for this being that before being pressure treated the wood is kiln died, and redwood reacts much better and stays stable during this process. The actual pressure treatment process and chemical composition is the same as a UC3 spec' treatment, but because the timber is so dry, the treatment is forced much further into the timber. The kiln drying will typically take the moisture content of the wood down to around 28% which is very low.
- User Class 4 Treatment (UC4)
- 75mm x 75mm
- Suitable for lap panels
- Not suitable for closeboard panels (see 100mm x 100mm posts)