Concrete Fencing FAQs

Have questions about concrete fencing? Our FAQs cover everything from installation and maintenance, helping you make informed decisions for a strong, long-lasting fence.

What size concrete post for a 6ft fence with gravel board?

For a 6ft fence with a gravel board, you’ll need 8ft (2.4m) concrete posts.

How to Calculate the Post Size

• Fence Panel Height: 6ft (1.8m).
• Gravel Board Height: Typically 6 inches (0.15m).
• Combined height = 6ft + 6 inches = 6.5ft (1.95m).
• Post Depth in Ground: Posts should be buried at least 2ft (0.6m) for stability.
• Total post length = 6.5ft (fence + gravel board) + 2ft (in-ground) = 8.5ft.

How deep should a concrete fence post be in the ground?

Concrete fence posts should be buried at least 2 feet (60cm) deep in the ground for stability. However, the exact depth depends on the height of the fence and the conditions of your site. Find out more.

General Rule of Thumb

• The post should be buried 1/3 of its total length in the ground.
• Example: For an 8ft post, bury 2.5ft in the ground.

Standard Depths for Common Fence Heights

• 4ft Fence: Post depth = 2ft.
• 6ft Fence: Post depth = 2ft to 2.5ft.
• 8ft Fence: Post depth = 3ft.

Factors That Affect Depth

• Fence Height: Taller fences require deeper post holes for stability.
• Soil Type: Soft or sandy soil: Go deeper (e.g., 2.5ft to 3ft) to prevent movement.
• Hard or clay soil: Standard depth (2ft) is usually sufficient.
• Windy Areas: If your fence is in an exposed or windy location, increase the depth for added support.
• Weight of Fence: Heavier fences (e.g., with gravel boards or closeboard panels) may need deeper posts.

How many bags of concrete do I need for 3 fence posts?

The number of concrete bags you need for 3 fence posts depends on the size of the post holes and the type of concrete mix you’re using. For example, our Rapid Set Fence Post Concrete – 20kg bag requires one bag per post. However, other post cement products may require different volumes per post to ensure a secure fit. Always check the manufacturer guidelines.

What is the best way to pour concrete to set a fence post?

For the post concrete, you can use the dry or wet method. In the dry method, pour the dry mix directly into the hole, add water on top, and stir slightly to ensure even absorption. For the wet method, mix the concrete in a bucket or wheelbarrow first, then pour it into the hole. Fill the hole up to 2-3 inches below ground level and slope the top of the concrete away from the post to prevent water pooling.

How long does post concrete take to set?

Rapid Set Post Concrete typically sets within 20-30 minutes, making it ideal for quick installations. However, while the post may feel stable after this initial setting period, it’s important to allow the concrete to fully cure for at least 24-48 hours before applying any weight or attaching fence panels.

For best results, avoid disturbing the post during the curing process, and consider waiting longer in colder or damp conditions, as these can slow down the setting time. Always check the specific instructions on the concrete mix you’re using, as setting times can vary slightly between products.

Can you drill holes in concrete fence posts?

Yes, you can drill holes in concrete fence posts, but it requires the right tools and techniques to avoid cracking or damaging the post.

1. Use the Right Drill: A hammer drill or rotary hammer is essential for drilling into concrete. Standard drills won’t have the power to penetrate.
2. Choose the Correct Drill Bit: Use a masonry drill bit designed for concrete. Ensure it’s the appropriate size for the hole you need.
3. Mark the Spot: Clearly mark where you want to drill. Double-check the placement to avoid unnecessary holes.
4. Drill Slowly: Start at a low speed to create a guide hole, then gradually increase speed. Apply steady pressure but avoid forcing the drill, as this can crack the concrete.
5. Cool the Bit: Drilling into concrete generates heat. Pause periodically to let the bit cool down and prevent wear.
6. Avoid Reinforcement Bars: If the post is reinforced with steel, hitting a rebar can damage your drill bit. Use a rebar detector beforehand or switch to a rebar cutter if needed.
7. Clean the Hole: Once drilled, clear out dust and debris using compressed air or a brush.

With the right tools and care, drilling into concrete fence posts is straightforward. Just take your time to avoid cracks or damage!

What are the benefits of using concrete posts in fencing?

Concrete posts offer several benefits for fencing, making them a popular choice for durability and long-term performance:

1. Exceptional Durability
2. Stability and Strength
3. Low Maintenance
4. Versatility
5. Cost-Effective in the Long Run
6. Aesthetic Options

By choosing concrete posts, you ensure a strong, long-lasting, and low maintenance fencing solution that can handle the test of time and weather. Want to learn more about how concrete fence posts could be perfect for your next fencing project? See our helpful article HERE!