How to Concrete in Fence Posts

By Kim
Last updated 15th January 2021 - Reading time: 6 mins

Concreting in fence posts is pretty simple when you know how. Check out our handy how-to guide to find out everything you need to know, including what tools and materials you need.

how to concrete in a fence post

What Tools Do I Need to Concrete in Fence Posts?

Below is a list of tools you will need to successfully concrete in your fence posts. There are not many tools required for this type of job.

  • Post hole digger
  • Spirt level

What Safety Equipment Do I Need to Concrete in Fence Posts?

When pouring the dry concrete mix, it’s very likely that a lot of it will fly away during the process. This can be dangerous, so it is recommended that you use goggles and a face-covering mask to prevent this flying concrete mix from entering your mouth, nose or eyes.

If your fence posts are made from wood, it may also be a good idea to wear gloves when handling them to prevent the possibility of getting splinters.

What Materials Do I Need to Concrete in Fence Posts?

You will need to materials in the list below to concrete in a fence post:

  • String
  • Boards
  • Spray paint (to mark out the post locations)
  • Posts
  • Dry quick set concrete for fence posts
  • Water
  • Gravel
  • Soil

How to Prepare for Fence Installation

To prepare for your fence installation, you must begin by ensuring you have all of the tools and materials necessary to complete the job. You should also make sure you have the appropriate safety equipment on hand so that you can complete the job safely.

how to concrete in fence posts 2

When you begin a fence post installation job, you should begin by squaring out your layout so that you know exactly what is going where and so that you can be sure the fence posts are in the correct position before digging the holes.

How to Concrete in Fence Posts Yourself - Step by Step Guide

Below is a list of the steps that need to be taken in order to successfully concrete in your fence posts:

Step 1

Begin by squaring up your layout using string and boards and mark out the locations where the posts will be. This allows you to see exactly where everything needs to be, and you can get a good idea of what the finished layout will look like.

how to concrete in fence posts step 1

Step 2

Next, use a post hole digger to dig the holes where your posts are going to be. The posts only need to be around 1/3 to 1/2 the height of the post above ground, and 3x the width of the post wide.

how to concrete in fence posts step 2

Step 3

Pour around 6 inches of gravel into the hole and tap it firmly down using the post. Then reset your strings and use a post level to ensure the gravel base allows the post the stand straight.

how to concrete in fence posts step 3

It is essential that your posts all stand fully straight; otherwise, you will struggle when it comes to adding in your fence panels.

Step 4

Once you’re confident that the post is entirely straight, attach brackets to the post to hold it firmly in place. You want to ensure that the post won’t move at all as you add the concrete as you want it to stay completely straight.

how to concrete in fence posts step 4

Step 5

Once your post is secure, add the fast-setting dry concrete mix into the hole until it’s around 3-4 inches from the top of the ground.

how to concrete in fence posts step 5

Make sure you are wearing eye protection and a face covering for this part of the job as the flyaway dust and debris from the dry concrete mix can be dangerous if it is inhaled or if it goes in your eyes.

Step 6

Check to make sure the post is still completely level then add water to the dry concrete according to the manufacturer’s instructions. Some manufacturers will require you to mix the solution slightly with an old stick or piece of timber to ensure it is thoroughly mixed and ready to set.

how to concrete in fence posts step 6

Step 7

After around 30-40 minutes, the concrete should be completely set. At this point, you can fill in the rest of the hole with soil to match the surrounding ground. Add this to the level of the rest of the ground and pat it down to ensure it is firm.

how to concrete in fence posts step 7

Step 8

Once completed, you can remove all of the brackets and string and continue with the rest of your project.

how to concrete in fence posts step 8


Can you install fence panels in existing concrete posts?

The best course of action for fitting fence panels to existing concrete posts is to attached timber to the existing posts and create a grove in which the fence posts can be slotted into and then fixed into place.

How do you stop fencing from rattling in concrete posts?

You can purchase fence panel grips or fence panel wedges from any DIY store to hold your fence panels in place and stop them from rattling in the wind.

How high can I build a fence?

At the front of your house, you can build a fence up to 1m in height. The sides and back of your home can have a fence up to 2 metres in height.

How do I maintain my fence?

It is recommended that you treat your fence panels with an appropriate treatment or preservative to keep it at its best. We recommend doing this once every 12 months.

Do I have to have my fence posts set in concrete, or is there an alternative?

You can erect your posts with a post support system. However, concreting in your fence posts is the best and most secure option for keeping your posts erect, steady, and straight.
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