3.6M Composite Decking Boards
Traditional in size, perfect for all projects.
0115 684 8754
It's popular for a reason
Fewer joins, less waste, and a length that just works, our whole composite decking range sticks to 3.6m length as standard.
Each decking range has up to 5 colours to pick from, boasts different profiles (for all tastes), an outstanding warranty and free nationwide delivery on orders over £1200.
SHOP OUR MOST POPULAR BOARDS
Core — best for value
3.6m composite decking from Select Core is a budget-friendly choice for garden projects. Ideal for homeowners, DIYers and trade professionals, it’s quick to install and offers durable, weather-resistant performance with minimal maintenance. From £19.00 per board
- Warranty: 15 years
- Board size: 146mm × 3600mm (also available at 5000mm)
- Thickness: 25mm
Capped: No - Reversible: Yes
- Colours: Antique, Coffee, Dark Grey, Light Grey, Teak
Premium — best for luxury with resilience
A strengthening polymer sleeve wraps the board for better resistance to scuffs, stains and the weather, backed by a longer 25-year warranty. Only £24.00 per board
- Warranty: 25 years
- Board size: 140mm × 3600mm
- Thickness: 23mm
- Capped: Yes — strengthening polymer sleeve
- Reversible: No
Colours: Antique, Dark Grey, Light Grey, Teak, Walnut
Rustic — best for an aged-timber look
Perfectly mimics weathered, aged timber for a natural, characterful finish, with all the charm of real wood with none of the upkeep. Only £26.64 per board
- Warranty: 15 years
- Board size: 140mm × 3600mm
- Thickness: 25mm
- Capped: No
- Reversible: No
- Colours: Coffee, Light Grey, Stone, Teak
Supreme — best for high-end gardens
Our top-tier board: a robust structure and a classy matte finish, wrapped in an enhanced polymer sleeve and guaranteed for 30 years.
- Warranty: 30 years
- Board size: 140mm × 3600mm
- Thickness: 20mm
- Capped: Yes — enhanced polymer sleeve
- Reversible: No
- Solid board: Yes
- Colours: Antique, Dark Grey, Light Grey, Teak, Walnut
Your quick buying guide
Grain and finish. All our boards carry a realistic wood grain. If you want that deep, woodgrain finish, go Core, or the look of naturally aged timber, go Rustic; for a contemporary matte finish, go Supreme.
Capped vs uncapped. A capped board (Premium and Supreme) has a protective polymer sleeve that improves stain, scratch and fade resistance. Uncapped boards (Core and Rustic) still resist the weather far better than timber and come in at a lower price.
Reversible boards. Only Core is reversible, giving you two surface options per board. Pick one or mix your finish.
Finish the job properly. Every range has a colour-matched accessories range with fascia, trims, screws and clips so edges and fixings disappear into the deck.
FAQs
Do you offer other decking sizes?
Yes. We provide 5m lengths in our core range.
How much do 3.6m composite decking boards cost?
Our 3.6m boards start from £19.00 per board for Core and rise to £38.40 for Supreme, depending on warranty, finish and capping. Order free samples to compare before you buy.
Can 3.6m composite decking boards be cut down?
Yes. Composite cuts cleanly with a circular saw, so you can trim boards to fit your layout. Seal or match cut ends with colour-matched fascia and trims for a tidy finish.
Are 3.6m boards better than shorter lengths?
For most gardens, yes. A 3.6m board spans a typical deck depth with fewer mid-run joins and less offcut waste than shorter boards, giving a cleaner finish. It also lands neatly on standard joist centres.
How long does composite decking last?
Far longer than timber, which often needs replacing within a decade or two. Our ranges are guaranteed from 15 up to 30 years, as long as they're installed correctly.
Why is 3.6m the go-to decking board length?
The 3.6m board is the most popular length in UK decking — and for good practical reasons, not just habit.
It spans a typical garden deck with fewer mid-run joins, so you get a cleaner, more seamless finish and fewer weak points to cut in. It's long enough to keep offcut waste low across a standard project, but still light enough to handle and position without a second pair of hands on every board.
3.6m also happens to be easy maths on site: 3600mm lands neatly on standard joist centres (300, 400 and 450mm), so boards sit where they should with minimal cutting. And because it matches the length UK decking has used for decades, it drops straight into projects the trade already knows inside out.
Why composite over timber?
Low maintenance — no sanding, oiling or annual treatment. An occasional wash keeps it looking new.
Durable — resists rot, warping and water damage that shorten the life of timber decks.
Fade resistant — Minimal fading, whilst holding its colour season after season.
Eco-conscious — made from recycled wood and plastic fibres, reducing landfill and deforestation.
How many 3.6m decking boards do I need?
A quick rule of thumb: one 3.6m board covers around half a square metre, so you'll need roughly 2 boards per m². Add about 10% on top for cuts, waste and the small expansion gap between boards.
For an exact figure — including joists, fascia, screws and clips —build a complete system using our decking calculator and watch it generate a full materials list in just a few clicks.