Measure the run of fence you’re replacing from post to post and enter it in metres with the height you need. The calculator works out how many 1.83m (6ft) bays that is, the boards for each bay at your chosen height, and the U-channels to slot them into your concrete posts. Kits assume a 300mm gravel board at the bottom of each bay; if you don’t have one, add two extra boards per bay. Skip anything you already have, and if your posts aren’t at standard 6ft centres, the boards cut down to fit.
Smooth & Grooved Composite Fence Panel
Select Size
Select: Post
Select Top and Bottom Rails
Select Boards
Select Colour
Colour
How Many Fence Panels Do You Need?
Enter your fence run in metres to calculate bays, slats, U-channels, and posts.
Calculate Fence Panels & Posts ↓Total
£ 59.99
Quantity
Reversible Smooth & Grooved Composite Fencing Kit
Our Smooth and Grooved Composite Fence Panel Kit brings style and simplicity together in one clever design, especially if you’re working with existing concrete posts. With a clean, grooved texture and tongue-and-groove boards, this kit is perfect for a quick and attractive garden upgrade.
Not sure what a fencing kit includes or which system is right for your garden? Our buyer’s guide to composite fencing kits explains the different options.
The composite material means no staining, sealing or painting is needed, and it resists rot, mould and warping. Designed specifically for existing concrete posts, these smooth and grooved panels create a simple slot-in composite fencing system using the included U-shaped connectors.
Available in classic shades such as anthracite grey, they can also be paired with our matching composite decking boards for a coordinated garden design.
Please Note:
Order Your Free Samples: We highly recommend ordering our free samples to confirm the colours before placing an order, as digital photos can vary significantly between screens.
Kit Setup: Our kits are based on having existing concrete posts and a 300 mm gravel board. Example: 6 ft fence boards cover 1.5 m, and the existing gravel board provides the remaining 300 mm, creating a finished 6 ft result.
Fence Slats: Fence boards are 1.83 m in length to ensure all existing concrete post widths are covered. Cutting may be required to fit on occasion.
Perfect for Concrete Posts
Simple Slot-In Installation
No Painting or Staining
What's in the Smooth Fencing Kit?
Whether you’re going solo or working with a pro, our guided instructions help you install with confidence—no tools or experience required. Please note the below is based on kit’s by size, each kit is total height including a 300mm gravel board.
Top & Bottom Rails (1x)
Connects and secures the fencing boards.
Boards (Based on 8ft) (14x)
durable composite hollow boards with a reversible smooth & grooved finish. Based on 300mm gravel board.
Boards (Based on 7ft) (12x)
durable composite hollow boards with a reversible smooth & grooved finish. Based on 300mm gravel board.
Boards (Based on 6ft) (10x)
durable composite hollow boards with a reversible smooth & grooved finish. Based on 300mm gravel board.
Boards (Based on 5ft) (8x)
durable composite hollow boards with a reversible smooth & grooved finish. Based on 300mm gravel board.
Boards (Based on 4ft) (6x)
durable composite hollow boards with a reversible smooth & grooved finish. Based on 300mm gravel board.
Boards (Based on 3ft) (4x)
durable composite hollow boards with a reversible smooth & grooved finish. Based on 300mm gravel board.
Boards (Based on 2ft) (3x)
durable composite hollow boards with a reversible smooth & grooved finish. Based on 300mm gravel board.
U Shape Channels (2x)
U-shape channels for concrete posts.
Installation Guide (1x)
Step-by-step instructions for easy setup.
Expert Advice for Smooth Profile Fencing
A Word from Our Expert, Allan Jeffrey BSc. Eng. (Hons), Composite Materials Specialist, Environmentalist, and CEO of Ultra Decking:
We developed our smooth and grooved fencing using our nearly decade-proven formulation, tested extensively in our composite decking range against harsh British weather — where we’ve even filmed customer sites six years down the line still looking immaculate. Our goal was simple: provide an affordable composite fence that looks modern and clean without the inflated price tags common on the market today. By blending our ten years of material experience with precision manufacturing, we’ve perfected a slot-in system that delivers long-term durability, low upkeep, and effortless installation.
Calculate Your Smooth Fencing: Bays, Boards and U-Channels for Existing Concrete Posts
Calculate
Key Benefits of Our Smooth Composite Panels
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Timeless Colours
Choose from a variety of colours to suit every landscape. Anthracite Grey remains a favourite thanks to its cool undertones and elegant look.
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Weatherproof and Durable
Unlike timber, composite won’t warp, rot, or splinter, even in wet or windy conditions with its increase moisture resistance. This is why composite fencing is easy to maintain.
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No Upkeep Needed
Composite fencing adds privacy and security to your area while also adding beauty.
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Built Stronger for Better Value
We use more material in our fence panels for increased strength, offering arguably better like-for-like value.
Specifications
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Height
2ft to 8ft (including a 300mm gravel board)
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Width
1.83m (6ft)
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Thickness
22mm
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Finish
Smooth & Grooved
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Colour
Anthracite Grey | Black | Chocolate | Grey
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Post Type
Concrete (not sold with kit)
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Installation
U Shape & Boards
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Warranty
10 Years Residential
Delivery Information
| Delivery Type | How Long? | Delivery Cost |
|---|---|---|
| Urgent | Estimated 1-4 Working Days | £79.99 |
| Normal* | Estimated 5 to 7 Working Days* | FREE |
| Royal Mail Standard (Small Parcels) | 3–5 Working Days | £8.00 |
| Royal Mail Standard (Large Parcels) | 3–5 Working Days | £29.95 |
| Collection | Collection from our warehouse | FREE |
| Sample Packs | 3–5 Working Days | FREE |
| *Normal | Distance Deliveries Can Exceed Estimate | FREE |
FAQ About Our Smooth Fence Panels
1 Will the fencing boards fade over time?
Yes, like all composite products, some fading occurs with UV exposure, around 20–30% on fencing, which stands in full sun all day. It is factored into the colouring: dark grey settles to a dark grey, and lighter shades soften in proportion.
2 Can I install this fencing by myself?
Yes. The boards slot into the U-channels on your existing concrete posts, and the panels are light enough to handle alone, so no specialist tools or trades are needed. Our composite fencing installation guide covers the order of fitting and the cuts for bays that aren’t at standard centres.
3 Does the kit include posts?
No. This kit is for existing concrete posts: the U-channels supplied fix to the posts you already have and the boards slot between them. If you have no posts, or you’re replacing them, you need a post kit as well.
4 How many kits do I need?
Measure the run from post to post in metres and use the fencing calculator on this page. Each kit fills one 1.83m (6ft) bay at your chosen height, so a 12m run on standard 6ft centres is six or seven kits depending on where the posts fall. If your posts are closer together, the boards cut down to fit.
5 Which colours does the kit come in?
Anthracite grey, black, chocolate and grey. Every board is reversible, with a smooth face and a grooved face, so each colour gives you two finishes from one kit.
6 Is it safe around pets and children?
Yes. The boards are splinter-free and resist stains, muddy paws and sticky fingers, and composite doesn’t overheat like metal fencing, so it’s a safer choice for little hands.
7 Do I need gravel boards?
For a standard 6ft x 6ft bay, a 300mm gravel board is assumed and the board count allows for it. If you have no gravel board, add two extra fence slats per bay to reach the same height.
As Seen In
