Composite decking in Sheffield
Composite decking looks like timber but does not rot, splinter or need staining. Fitted on a proper frame, it lasts for decades with little more than a wash.
Installed composite decking typically costs £100 to £200 per square metre in the UK. A 15 m² deck usually comes to £1,500 to £3,000.
A free matching service, not an installer. We find you a local decking installer. How it works
Is composite right for you?
- You want a deck that needs a wash, not a weekend of sanding and staining every year.
- Your garden is damp or shady, where timber tends to go green and slippery.
- You have children or pets and want boards with no splinters.
- You plan to stay in the house for years, so the higher upfront price pays back.
- You want an even colour that stays close to how it looked on day one.
Typical composite decking prices
| Deck size | Typical price |
|---|---|
| Small 3 × 3 m, 9 m² | £900 to £1,800 |
| Medium 5 × 3 m, 15 m² | £1,500 to £3,000 |
| Large 5 × 5 m, 25 m² | £2,500 to £5,000 |
| Raised decking More than 30 cm off the ground | Adds about 20% to 60% |
Typical installed prices from published UK price guides, checked October 2026. A guide, not a quote. Cheaper hollow boards sit at the low end; solid, capped boards at the high end.
What a good quote includes
Six things to ask every installer to put in writing, so you can compare quotes properly.
Capped boards
Capped composite has a protective outer shell that resists stains and fading. Ask whether the boards are capped and which brand they are.
A frame that will outlast the boards
Treated timber joists are common; aluminium or composite joists last longer. Ask about joist spacing, which should follow the board maker's instructions.
Ground prepared properly
Weed membrane, a level base and drainage underneath stop sinking and keep the frame dry.
Gaps left for movement
Composite expands and contracts with temperature. The installer should follow the maker's gap guidance at the ends and edges.
Hidden fixings and finished edges
Clip systems hide the screws, and fascia boards cover the frame for a clean finish.
Both warranties in writing
The board maker's warranty (often 25 years or more) and the installer's own guarantee on the workmanship.
Thinking about composite decking for your garden?
Get a free quoteHow it gets built
Survey and fixed price
The installer measures, checks the ground and drainage, and helps you choose boards and colour.
Groundwork
Old decking or turf removed, the ground levelled, membrane laid and the frame supports set.
Frame
Joists fixed level at the right spacing, with any steps or raised sections built in.
Boards and finish
Boards clipped down, fascias, edging, steps, lighting and any balustrade fitted. Most decks take two to five days.
Questions people ask
How much does composite decking cost per m² in Sheffield?
Installed composite decking typically costs £100 to £200 per square metre, depending on the boards, the frame and the ground. Our decking cost calculator works out a range for your size.
How long does composite decking last?
Good capped composite boards often come with warranties of 25 years or more. A frame built properly underneath matters just as much. Read how long composite decking lasts.
Is composite decking slippery?
Modern capped boards with a textured surface are generally less slippery than timber that has gone green. See is composite decking slippery.
Does composite decking get hot?
Dark composite boards can get hot in direct summer sun. Lighter colours stay cooler, so choose a paler shade for a south-facing deck.
Do I need planning permission for composite decking?
Not usually, if the deck is no more than 30 cm above the ground. Read planning permission for decking for the full rules.
Can composite decking be laid on a slope?
Yes. The frame is built level on adjustable supports or posts, with steps where needed. Raised decks cost more and may need planning permission.
Get a free quote for composite decking
Three short steps, about two minutes. The more you tell us, the more useful the installer's first call will be.
We're a free matching service, not an installer. We find a local decking installer and tell you who they are before anyone contacts you.
Thank you. We've got your enquiry.
- We'll find a decking installer who covers your area and tell you who they are, usually within one working day.
- We only pass on your details if you tell us you're happy for us to.
- They then arrange a visit to measure up and give you a fixed price. We won't send you marketing.