Installing a fence is a straightforward way to enhance the security, privacy, and aesthetic appeal of your property. However, the very foundation of your fence—its posts—is critical to ensuring its durability and stability. This is where Postcrete comes into play. In this comprehensive guide, we'll delve into everything you need to know about Postcrete for fence installation, from its benefits to a step-by-step installation process.

What is Postcrete?

Postcrete is a fast-setting concrete mix specifically designed for setting wooden, metal, and concrete posts. It consists of a blend of cement, sand, and aggregate, and is known for its ease of use and rapid setting time. Unlike traditional concrete, Postcrete doesn't require premixing; it can be poured directly into the post hole and activated with water.

Benefits of Using Postcrete

1. Ease of Use

One of the primary advantages of Postcrete is its user-friendly nature. You don't need any special equipment or skills to use it, making it an ideal choice for DIY enthusiasts and professional contractors alike.

2. Quick Setting

Postcrete typically sets within 5 to 10 minutes, allowing you to complete your fence installation project much faster than if using conventional concrete, which can take hours to set.

3. Strength and Durability

Despite its fast-setting nature, Postcrete provides a robust and durable foundation for your posts. It delivers excellent holding power and resistance to weather conditions, ensuring your fence stands the test of time.

4. No Mixing Required

With Postcrete, there's no need for pre-mixing. You simply pour the dry mix into the post hole and add water. This simplifies the installation process and reduces the risk of errors in mixing.

How to Use Postcrete for Fence Installation

Step 1: Gather Your Materials

Before you begin, ensure you have all the necessary materials:

  • Fence posts
  • Postcrete
  • Water
  • Spade or digging tool
  • Spirit level
  • Measuring tape

Step 2: Mark and Dig Post Holes

Mark the locations for your fence posts using stakes and string. Ensure the spacing between posts is uniform. Dig holes approximately three times the width of the post and one-third the height of the post below ground level.

Step 3: Position the Post

Place the fence post in the centre of the hole. Use a spirit level to ensure it is plumb (vertically straight). This step is crucial for the stability and appearance of your fence.

Step 4: Add Postcrete

Pour the Postcrete dry mix evenly around the post, directly into the hole. Follow the manufacturer’s guidelines for the quantity required, typically around 20 kg per post hole.

Step 5: Add Water

Add the recommended amount of water directly onto the Postcrete. Typically, this is around 2.5 litres per 20 kg bag. The water will activate the mix.

Step 6: Adjust and Hold

Quickly adjust the post to the desired position and hold it for a few minutes as the Postcrete starts to set. The setting time can vary slightly depending on the temperature and humidity.

Step 7: Allow to Cure

While Postcrete sets quickly, it’s a good idea to wait at least 24 hours before applying any force or weight to the posts. This ensures maximum strength and stability.

Tips for Best Results

1. Work in Small Sections

Given its rapid setting time, it's best to work in small sections, setting one post at a time. This ensures you have ample time to adjust each post before the Postcrete hardens.

2. Weather Considerations

Avoid installing posts in extremely cold or wet conditions, as this can affect the curing process. If you must work in adverse weather, consider covering the posts and holes to protect them from excess moisture.

3. Check Levels Frequently

Regularly check the alignment and level of each post as you work. Once the Postcrete sets, it becomes challenging to make adjustments.

4. Safety First

Always wear appropriate safety gear, including gloves and eye protection, when handling Postcrete and other construction materials.

Common Questions About Postcrete

Is Postcrete Suitable for All Types of Posts?

Yes, Postcrete is versatile and can be used for wooden, metal, and concrete posts. However, always check the manufacturer's guidelines for any specific recommendations.

Can I Use Postcrete for Other Applications?

While Postcrete is designed primarily for setting posts, it can also be used for other small-scale concrete tasks where a rapid setting time is beneficial.

How Long Does Postcrete Take to Fully Cure?

While Postcrete sets in as little as 5 to 10 minutes, it reaches full strength after about 24 hours. Avoid applying heavy loads or pressure to the posts during this curing period.

Is Postcrete Environmentally Friendly?

Postcrete is similar to traditional concrete in terms of environmental impact. Always follow local regulations for disposal and consider using eco-friendly alternatives if available.


Postcrete offers a simple, efficient, and effective solution for setting fence posts. Its quick-setting nature and ease of use make it an ideal choice for both DIY enthusiasts and professionals. By following the steps outlined in this guide, you can ensure a sturdy and long-lasting fence installation.

Ready to get started on your fencing project? Armed with this knowledge about Postcrete, you’re well on your way to achieving a durable and aesthetically pleasing fence that will stand the test of time.