Setting up a fence is an important task for any property owner, whether it’s for security, privacy, or simply to add to the aesthetics of your garden. Using Postcrete, a ready-to-use blend of cement and aggregate found in many DIY stores, can simplify the process significantly. This comprehensive guide will walk you through the steps of using Postcrete for fence posts, ensuring a sturdy and long-lasting installation.

What is Postcrete?

Postcrete is a convenient, pre-mixed concrete specifically designed for setting fence posts. Unlike traditional concrete, it doesn’t require mixing with water before being poured into the hole. Instead, water is added after placing the Postcrete around the post, making it an ideal choice for quick and efficient fence setting.

Benefits of Using Postcrete

  1. Ease of Use: No need for mixing; just pour and add water.
  2. Fast Setting: Sets in 5-10 minutes, reducing waiting time.
  3. Strong Bond: Provides robust support for fence posts.
  4. Convenient Packaging: Comes in ready-to-use bags.

Tools and Materials Needed

Before you start, gather the following tools and materials:

  • Fence posts
  • Postcrete
  • Shovel
  • Spirit level
  • Watering can or hose
  • Measuring tape
  • Wooden stakes and string (for alignment)
  • Gravel (optional, for enhanced drainage)

Step-by-Step Instructions

Step 1: Measure and Mark Your Fence Line

Start by measuring the area where you plan to install the fence. Use wooden stakes and string to mark the fence line, ensuring it’s straight. Measure the distance between each fence post and mark the spots on the ground where the posts will be placed.

Step 2: Dig the Post Holes

Using a shovel or post-hole digger, dig holes at each marked spot. The depth and width of the holes depend on the height and width of your fence posts. As a general rule, the hole should be about one-third the height of the post and three times its width.

Step 3: Position the Posts

Place a layer of gravel at the bottom of each hole for drainage. Position the fence post in the centre of the hole, using a spirit level to ensure it’s plumb (vertically straight). Ask a helper to hold the post in place, or use temporary supports if you’re working alone.

Step 4: Add Postcrete

Pour the Postcrete evenly around the post until the hole is filled up to ground level. It’s crucial not to mix the Postcrete with water before placing it in the hole; it should be dry.

Step 5: Add Water

Immediately after adding the Postcrete, pour water over it. Follow the instructions on the Postcrete packaging for the correct amount of water. Generally, about 2 litres of water per bag is recommended. Distribute the water evenly over the Postcrete.

Step 6: Allow to Set

Hold the post in place for a few minutes until the Postcrete begins to set. This usually takes about 5-10 minutes. Once it starts to harden, you can release the post, but avoid putting any pressure or weight on it for at least 10-15 minutes to ensure it sets properly.

Step 7: Final Adjustments

Check the post again with the spirit level to ensure it’s still plumb. Make any minor adjustments while the Postcrete is still workable. Once it’s fully set, you’ll have a strong foundation for your fence post.

Step 8: Attach Fence Panels

After allowing the Postcrete to cure for a few hours, you can proceed to attach the fence panels to the posts. Follow the manufacturer’s instructions for securing the panels.

Tips for Success

  • Work Quickly: Postcrete sets fast, so you need to work promptly once you start adding water.
  • Use a Spirit Level: Ensuring your posts are perfectly vertical is crucial for a sturdy fence.
  • Check Local Regulations: Some areas have regulations regarding fence height and placement. Be sure to check these before starting your project.
  • Safety First: Wear gloves and eye protection when handling Postcrete to avoid skin and eye irritation.


Using Postcrete for fence posts is an efficient and straightforward method, providing a strong and durable foundation for your fencing. By following this step-by-step guide, you can ensure a professional-quality installation that will stand the test of time. Whether you’re a seasoned DIY enthusiast or a novice, Postcrete makes the process of setting fence posts quick and hassle-free. Happy fencing!