When it comes to ensuring the stability and longevity of your fence, the quality of your post foundations is crucial. One of the most efficient and effective methods for securing fence posts is by using Postcrete. This specially formulated concrete mix is designed to set quickly and provide robust support. In this comprehensive guide, we'll walk you through the steps on how to use Postcrete for stronger fence posts.

What is Postcrete?

Postcrete is a ready-to-use blend of selected sand, cement and additives, specifically designed for fixing wooden, concrete and metal posts. It’s particularly favoured for its quick setting properties, allowing DIY enthusiasts and professionals alike to secure fence posts efficiently without compromising on strength.

Key Benefits of Postcrete:

  • Quick Setting: Begins to set in under 10 minutes.
  • Ease of Use: No mixing required - simply pour into the hole.
  • Strong and Durable: Provides a solid base for fence posts.
  • Weather Resistant: Maintains integrity in various weather conditions.

Tools and Materials Needed

Before you begin, gather the following tools and materials:

  • Postcrete
  • Fence posts
  • Shovel or post hole digger
  • Spirit level
  • Tape measure
  • Gravel (optional)
  • Watering can or hose

Step-by-Step Guide to Using Postcrete

1. Prepare the Post Hole

Start by marking the location where you want to place the fence post. Using a shovel or post hole digger, excavate a hole to the following dimensions:

  • Depth: At least one-third of the post's total height.
  • Width: About twice the diameter of the post.

2. Add Gravel for Drainage (Optional)

For added stability and drainage, you can place a layer of gravel at the bottom of the post hole. This step is particularly useful if you're working on soil that retains water.

3. Position the Fence Post

Insert the fence post into the hole, ensuring it is upright and centred. Use a spirit level to check that the post is vertical. You may need to use temporary supports to hold the post in place.

4. Pour in the Postcrete

Open the bag of Postcrete and pour it directly into the hole around the post. The amount of Postcrete required will depend on the size of the hole and the post, but generally, a single 20kg bag will fix one average-sized post.

5. Add Water

Evenly sprinkle water over the Postcrete using a watering can or hose. The typical ratio is approximately 2.5 litres of water per 20kg bag of Postcrete. Be sure to pour the water slowly to allow it to penetrate the mix thoroughly.

6. Allow Time to Set

Postcrete begins to set within 5-10 minutes, but it's recommended to leave the post undisturbed for about 15-20 minutes. During this time, check periodically to ensure the post remains level.

7. Final Adjustments and Finish

Once the Postcrete has set, remove any temporary supports. If necessary, add more soil around the base of the post and compact it to ensure stability.

Tips for Best Results

  • Mix Gradually: If you're new to using Postcrete, start with smaller amounts and add more as needed.
  • Check Weather Conditions: Avoid using Postcrete in freezing temperatures or during heavy rain.
  • Follow Manufacturer’s Instructions: Always adhere to the guidelines provided on the Postcrete bag for specific instructions and safety warnings.

When to Use Postcrete

Postcrete is ideal for a variety of applications beyond fence posts, including:

  • Gate posts
  • Pergolas and gazebos
  • Signposts
  • Garden arches

Its versatility and rapid setting time make it a go-to choice for many outdoor projects requiring sturdy support.


Using Postcrete is a straightforward and effective way to ensure your fence posts are securely anchored. With its quick setting properties and ease of use, it's accessible for both DIY enthusiasts and professional builders. By following the steps outlined in this guide, you can achieve strong, durable fence posts that withstand the test of time and weather conditions.

Take the guesswork out of your next fencing project and trust in the reliability of Postcrete. For more tips and advice on similar projects, stay tuned to our blog and feel free to leave your comments and questions below. Happy building!