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Want your fence to look smart, last longer, and keep your garden secure? The little bits and pieces — post caps, supports, fasteners, and driving tools — make a big difference. Accessories aren’t just decorative; they protect timber, stabilize posts, and make repairs quick and reliable. Think of them as the jewellery and toolbox for your fence: without them, the whole structure can look unfinished and fail sooner than you’d expect.
There’s a surprising range of accessories, and knowing the right ones can save time and money. Below I break down the essentials and explain when to use each, using sizes in inches so you can visualise what fits your posts and gates.
Post caps sit on top of fence posts to keep water out and add a finished look. Common sizes you'll see are around 4 x 4 inches and 5 x 5 inches to suit standard wooden posts. Choose metal or UV-stable plastic for long life. Metal caps can be powder-coated for weather resistance, while plastic caps are low-maintenance and won’t rust. They also keep birds from perching in the post tops, which helps prevent rot inside.
Post supports with a spike are brilliant when you want a solid fence without pouring concrete. Supports with a spike length around 2 feet or 2 1/2 feet allow you to secure timber posts into the ground firmly, especially useful in soft soil. These supports let you replace or swap panels easily, and they reduce contact between wood and wet ground, which extends post life. If you have shallow utilities underground or want a non-permanent solution, spike supports are a go-to choice.
If you're using screw-in or spike-based systems, specific driving tools make installation both faster and safer. Tools designed for 1.8 to 3.5 inch fittings let you drive fixings home with less effort and far more accuracy than a hammer. Driving tools reduce hand strain and help achieve consistent depth — crucial when you want a uniform look along a long run of fencing.
Repair spurs are little lifesavers when a panel or post gets damaged. They allow you to splice timber or fit a replacement post quickly without rebuilding the entire section. For those small, unexpected repairs, a spur or easy-fit repair kit helps you get back to enjoying your garden without a full weekend project.
For heavy gates, drive-throughs, or wall-mounted boxes, cantilever arms and mounting posts add the rigidity you need. Arms of roughly 18 inches or 35 inches are common for different gate types and give you options for a shallow or deep mounting. When installing electrical boxes, a robust mounting post keeps everything aligned and accessible.
If your project includes running cables or tidy trunking near a gate, spacer bars around 1 inch thick are handy for securing cable runs inside trunking and avoiding crushed wires. A neat trunking install not only looks professional but also keeps electrical components safe from weather and accidental damage.
Where you buy matters: some stores focus on garden timber and fence hardware, others on electrical fittings and mounting gear. Below are outlets that stock the parts you’ll need, each with its own strengths.
Buy Sheds Direct often stocks a range of fence-specific parts like post caps in 4 x 4 and 5 x 5 inch sizes, post supports with spikes roughly 2 to 2 1/2 feet long, and driving tools suited for fencefast systems. They’re a solid choice if your main focus is timber fencing and you need both hardware and timber panels in matching styles.
Expert Electrical is a great place to pick up items such as powder-coated mounting posts for electrical boxes, cantilever arms in roughly 18 inch or 35 1/2 inch lengths, and trunking accessories including 1 inch spacer bars sold in bulk. If your gate project includes electrics or lighting, they make integrating those pieces straightforward.
B&Q and Wickes are go-to chains for many DIYers because they combine timber, hardware, and basic electrical bits in one visit. From 4 x 4 inch post caps to universal post supports and driving tools, they carry practical, ready-to-fit parts for most garden fencing tasks. They also stock paint, preservative, and other finishings to match the hardware to your aesthetic.
If you want professional-grade driving tools, heavy-duty supports, or larger quantities of fasteners, Screwfix and Toolstation are where tradespeople shop. They tend to have robust driving tools compatible with 1.8 to 3.5 inch fittings, and bulk packs of repair spurs and fasteners for longer runs of fencing or commercial jobs.
Homebase offers a nice balance of consumer-friendly prices and specialist pieces, while Travis Perkins is more trade-oriented with strong selections of robust mounting posts and heavy-duty fixings. Both are good stops if you’re combining landscaping or building work with fencing projects.
Material choice decides how long accessories will last and how much maintenance they need. Galvanised steel and powder-coated metals resist rust and are excellent for post supports and cantilever arms. UV-stable plastics suit post caps and low-load trims. For high-moisture conditions, stainless fasteners and metal caps are worth the extra cost because they reduce long-term maintenance.
Measure twice, buy once — it’s cliché for a reason. If your post is a standard 4 x 4 inch or 5 x 5 inch, choose accessories marked for those sizes. When a product lists fit ranges, aim for the middle of the range for the best fit. For spikes, a 2 foot to 2 1/2 foot length is ideal in most backyards; go longer in soft or loamy soil to improve stability. If you’re unsure, take a post to the store or snap a photo with a tape measure and compare before buying.
Start by planning the run: mark post positions, check for buried services, and set a consistent depth for posts. Use a spirit level and a string line to keep everything straight. When using spike supports, make sure the spike is firmly driven and the post is square before tightening fixings. For driving tools, use steady pressure and keep your wrist aligned to avoid injury. If you’re adding electrics, mount boxes on a powder-coated post at a comfortable working height to avoid future strain when servicing components.
Regular checks are quick insurance against big repairs. Look for loose fixings, cracked caps, or signs of rust at least once a year. Replace damaged caps immediately to prevent water ingress. For metal parts, a touch of exterior-grade paint or a rust inhibitor will add years to their lifespan. For timber posts, ensure the base doesn’t sit in pooled water — spike supports help here — and apply preservative to exposed cuts or drilled areas.
It’s tempting to go cheap on small parts, but spending a little more on galvanised or powder-coated metal often pays off. Save on purely decorative pieces if you’re on a tight budget — caps and trims are cheaper to replace than a rotten post. Invest in a good driving tool if you’ll be installing multiple posts; it reduces labour time and gives a neater finish. Buy bulk fasteners from trade suppliers if you’re doing a long run; little savings per screw add up quickly.
You don’t need to buy everything from a single retailer. It’s common to get timber and decorative caps from a garden-focused store and pick up mounting posts, cantilever arms, or trunking from an electrical supplier. Just make sure sizes and fixings match; bringing a sample post or noting exact dimensions helps avoid returns or compatibility headaches.
For the environmentally minded, look for recycled-plastic post caps and FSC-certified timber. Metal parts made from recycled steel are becoming easier to find and still offer sturdy performance. Choosing long-lasting materials reduces waste — a single durable post support can avoid repeated replacements and lower your overall environmental footprint.
Simple repairs and standard fence installs are reasonable DIY jobs, but call a professional if you’re dealing with a retaining wall, a heavy automated gate, or complex electrical work. Pros have gear for deep foundations, heavy cantilever systems, and compliant electrics. If your gate supports a drive-through or is motorised, professional installation ensures safety and longevity.
Before you click "buy," run through this short checklist: confirm post dimensions in inches, pick supports with adequate spike length for your soil, choose corrosion-resistant materials for metal parts, and match fastener sizes to your timber. If electrics are involved, check mounting post compatibility with the box and plan cable runs inside trunking using spacer bars where needed.
Fence and gate accessories might seem like small details, but they transform a flimsy boundary into a solid, long-lasting feature of your home. From 4 x 4 inch post caps to 2 to 2 1/2 foot spike supports, the right parts offer protection, stability, and a cleaner finish. Whether you shop with a specialist fencing retailer or pick up technical bits from an electrical store, planning, correct sizing, and choosing the right materials will save you time and money. Ready to upgrade? Measure up, make a list, and enjoy a tidier, tougher fence that carries your garden through another season.
| Fence & Gate Accessories | Price | |
|---|---|---|
| Forest 65-80mm Post Support With Spike 600mm | £ 11,99 | |
| Unitrunk Single Channel Cantilever Arm 2 Hole 900mm | £ 12,71 | |
| Forest 85-105mm Post Support With Spike 750mm | £ 13,99 | |
| Falcon Trunking 25mm Spacer Bar Saddle Black Pack Of 100 | £ 52,70 |
