Planning a DIY Post and Rail Fence? Read This Before You Dig a Single Hole

Post and rail fencing is a popular choice for both rural and domestic properties, offering a simple, cost-effective solution for marking boundaries, containing livestock, or enhancing garden aesthetics. Many property owners in Sevenoaks, Kent consider taking on post and rail fencing as a DIY project. While this type of fencing appears straightforward, there are a number of critical steps and potential pitfalls that can make or break your installation. At Fast Fix Fencing Sevenoaks, we’ve seen first-hand how DIY enthusiasm can quickly turn into frustration without the right planning and execution.

Before you lift a spade or buy your first post, read this guide to ensure your fence stands strong, looks great, and lasts for years.

Why Proper Planning Is Crucial

Installing a post and rail fence isn’t just about knocking a few posts into the ground. A well-constructed fence must be:

• Structurally sound
  
• Level and aligned
  
• Built to suit ground conditions
  
• Compliant with local regulations
  

Failing to plan correctly can result in leaning posts, uneven rails, premature rot, or costly rework.

Things to Consider Before You Start

1. Purpose and Function

Ask yourself: What is the fence for?

• Containing livestock or pets?
  
• Marking property boundaries?
  
• Aesthetic enhancement for garden spaces?
  

Your answer will determine the type of posts, number of rails, spacing, and any additional features such as wire mesh or gates.

2. Boundary Accuracy

Never assume you know exactly where your land starts and ends.

• Check property deeds and boundary maps
  
• Speak with neighbours if fencing near shared lines
  
• Avoid legal disputes by confirming boundaries in advance
  

In Sevenoaks, Kent, some rural properties may have historic hedgerows or markers that need careful consideration.

3. Ground Conditions

The soil type and terrain directly affect how you install your posts.

• Sandy or loose soils may require deeper post holes
  
• Clay soil can expand and contract, affecting stability
  
• Rocky ground may need mechanical augers or specialist tools
  

Always inspect the area in dry and wet conditions to understand how the ground behaves.

4. Materials and Treatment

Choosing the right materials is key to longevity and ease of installation.

• Use pressure-treated softwood for rot resistance
  
• Ensure posts are long enough for secure anchoring (at least 600mm into the ground)
  
• Select galvanised nails or bolts to prevent corrosion
  

At Fast Fix Fencing Sevenoaks, we recommend using locally sourced, treated timber suitable for the climate in Sevenoaks, Kent.

5. Legal and Planning Requirements

Most fencing projects don’t require planning permission, but there are exceptions.

• Fences next to highways or over 2 metres high may need approval
  
• Conservation areas or listed properties may have restrictions
  
• Always check with the local council before proceeding
  

Failing to comply can result in enforcement notices and the need to remove non-compliant fencing.

Key Steps for a Successful DIY Post and Rail Fence

Step 1: Measure and Mark

• Use string lines and stakes to map out your fence run
  
• Mark post positions evenly (typically 1.8 to 2.4 metres apart)
  
• Check for underground utilities before digging
  

Step 2: Dig and Set Posts

• Dig holes at least 600mm deep (deeper in soft ground)
  
• Use concrete or compacted gravel to secure posts
  
• Ensure posts are level and aligned before the concrete sets
  

Step 3: Fit Rails

• Fit bottom rail 150–300mm above ground level to reduce rot
  
• Use galvanised nails or coach bolts for secure fixing
  
• Double-check levels and spacing throughout the run
  

Step 4: Optional Additions

• Add stock fencing or mesh for livestock or pet containment
  
• Install gates with proper bracing for access points
  
• Apply a preservative or stain for extended life and appearance
  

Common DIY Mistakes to Avoid

• Uneven post heights – leads to a wavy, unprofessional appearance
  
• Inconsistent spacing – affects fence strength and visual alignment
  
• Shallow post holes – can result in movement or collapse
  
• Using untreated timber – dramatically reduces lifespan
  
• Not accounting for terrain changes – causes alignment problems
  

These are the issues we’re most often called out to fix across Sevenoaks, Kent.

When to Call in the Professionals

While DIY can be rewarding, it’s not always the most practical solution—especially for long runs, uneven terrain, or heavy-duty fencing. Hiring professionals like Fast Fix Fencing Sevenoaks offers:

• Time savings and stress reduction
  
• Proper tools and equipment for challenging ground
  
• Guaranteed straight, level, and durable installation
  
• Advice on materials, layouts, and long-term maintenance
  

We’re happy to provide a free quote and guidance if you’re unsure whether to proceed yourself or bring in expert help.

Conclusion

A post and rail fence can be a valuable and attractive addition to any property, but only if it’s properly planned and executed. Whether you’re fencing off a garden or a paddock in Sevenoaks, Kent, don’t underestimate the importance of preparation, material selection, and precision. Before you dig your first hole, take the time to assess your site, understand your requirements, and make informed decisions. If you decide to leave it to the experts, Fast Fix Fencing Sevenoaks is here to help with professional advice and reliable installation tailored to your needs.

Call us on: 01732 440 994
Click here to find out more about Fast Fix Fencing Sevenoaks
Click here to complete our contact form and see how we can help with your fencing needs.