Should You Put Gravel At The Bottom Of A Wood Fence Post?
Gravel vs. Concrete: A Fence Pro's Guide to Setting Posts
So, you're ready to tackle that DIY fence project? Awesome! One of the biggest decisions you'll face is how to set your posts. Should you go with a gravel base or straight concrete? As a professional fence builder, I'm here to break down the pros and cons of each, so you can make the best choice for your backyard.
The Gravel Base Method
This involves pouring a layer of gravel at the bottom of your post hole before adding concrete.
Pros
Drainage: Gravel creates a drainage layer, allowing water to flow away from the post. This reduces the risk of rot, especially in clay soil that doesn't drain well.
Frost heave: In colder climates, water in the soil can freeze and expand, pushing your posts upward. Gravel helps minimize this "frost heave in well drained soil" by providing space for that expansion.
Cost-effective: Gravel is generally cheaper than concrete, so you might save a bit of money.
Cons
Less stability: While gravel provides some support, it doesn't offer the rock-solid stability of concrete, especially in loose, sandy soil.
More work: Adding a gravel base is an extra step in the process.
The Concrete Only Method
This is the more traditional approach for setting your posts directly in concrete.
Pros
Maximum stability: Concrete provides a strong, solid base for your posts, ensuring they stay put even in high winds or unstable soil.
Simplicity: It's a straightforward process, just set the post, pour the concrete, and let it cure.
Cons
Drainage issues: Concrete can trap water around the post, increasing the risk of rot in poorly draining soil.
Susceptible to frost heave: The concrete itself can be affected by freezing temperatures and frost heave, potentially cracking or shifting over time.
Here are a few more things to consider
Your soil type: Clay soil benefits greatly from a gravel base, while sandy soil might not need it as much.
The height and weight of your fence: Taller, heavier fences need extra stability, so concrete is crucial.
Ultimately, the best approach depends on your specific circumstances, like soil and weather. By understanding the pros and cons of each method, you can make an informed decision and build a fence that will stand the test of time. Good luck with your project!
