Choosing the correct fence post size is more or less the first step in the fence-building process.

It’s important to understand what size is right for your project so that you can make an informed decision on purchase.

As landscaping experts, Harlow Bros can guide you through everything you need to know when choosing fence post sizes.

We will also walk you through the right materials depending on your project, and how to calculate the best size to use.

What fence post size do I need?

A couple of aspects you need to think about are the material and height of your fence posts.

The choice between wooden and concrete posts is important, but is purely driven by the aesthetic and durability you’re looking for. Here is a summary of both:

Concrete Posts

Concrete fence posts are known for their sturdiness, making them a good choice if you’re looking for more reinforced fencing. However, due to their weight, they can be difficult to move around and secure in place. Our recessed concrete fence posts aim to help with this by allowing rails to fit neatly with the post itself. The rail can then be attached directly to the pre-holed concrete post using metal bolts.

Timber Posts

Timber fence posts are lighter and easier to work with. However, like all timber products, they are a natural product. This can be significantly enhanced by buying pressure-treated timber posts to ensure they remain durable over time.

Calculating Post Lengths

Once you've decided on the material, you then need to calculate the post lengths. This will be based on the height of your fence panels.

For a 6-foot (1.828m) fence, you will need 8-foot (2.4m) posts, allowing for 2 feet (0.6m) of the post to be buried in the ground for stability.

For example, for a 6-foot fence, this 100x100 2.4m fence post would work perfectly.

How Deep Does a Fence Post Need to Be?

A good rule of thumb is to bury at least one-third of the post underground. The type of fence you are installing also plays a significant role in deciding the depth. Decorative fences, which are often lighter and less subject to strong winds, might not need as much depth as more substantial privacy fences.

As always, if you need some help with specific fence requirements, always contact us at Harlow Bros, and we’ll do our best to help.

How To Dig A Fence Post Hole

Knowing how to dig a fence post hole is half the battle, and it probably sounds easier than you think. Having the right tools will make your life significantly easier, especially if you have multiple holes to dig.

A shovel and clamshell digger will help, but getting yourself a tile spade or tamper-end digging bar will be incredibly helpful in removing rocks, and digging deeper than a standard shovel could ever do.

Still Stuck on What Fence Post Sizes You Need?

Still unsure about what fence post sizes you need? Our timber experts at Harlow Bros are here to help. We can help with all your timber fencing needs, including material sourcing and advice.

We can help you find the right fence post size for your project. Contact us today for support.

Need help sourcing fence panels? Check out our guide here.