If you are thinking about adding decking to your garden, one of the first decisions you will face is choosing between composite and timber. Both are popular options, and both can look great when installed well. But they work differently, cost different amounts, and need different levels of care over the years.
This guide breaks down each material side by side so you can make the right choice for your outdoor space.
What Is Timber Decking?
Timber decking is made from natural wood. The most common options in the UK are softwoods like pine and larch, and hardwoods like oak and iroko. Softwood is the cheaper choice and widely available. Hardwood costs more but is naturally denser and more resistant to rot and wear.
Timber has been used for decking for a very long time. It looks natural, feels warm underfoot, and can be painted, stained, or oiled to suit any garden style.
What Is Composite Decking?
Composite decking is made from a mix of wood fibres and plastic. The combination gives it a wood-like appearance while also making it harder-wearing and easier to look after. Most composite boards are solid or hollow, and they come in a wide range of colours and finishes.
Composite decking is a newer product and has grown in popularity over the last decade, especially with homeowners who want a low-maintenance garden.
Head-to-Head Comparison
| Feature | Composite Decking | Timber Decking |
|---|---|---|
| Upfront cost | Higher (approx. £90-£150 per m²) | Lower (approx. £40-£80 per m²) |
| Lifespan | 25-30 years+ | 10-20 years (with maintenance) |
| Maintenance | Very low | Regular (annual oiling, treating, sanding) |
| Appearance | Consistent, uniform finish | Natural, warm, varied grain |
| Slip resistance | Good (grooved surface) | Can become slippery when wet |
| Eco credentials | Mixed (contains plastic) | Good if from certified sources (FSC) |
| Repairability | Harder to repair individual boards | Easier to replace damaged sections |
| Installation | Specialist clips and fixings | Standard fixings, straightforward |
Cost: Which Is Cheaper?
Timber wins on upfront cost. A basic softwood deck costs less per square metre to supply and install than composite. However, the full picture is a bit more complicated.
Timber needs ongoing maintenance every year. You will need to oil or treat the wood, sand down rough patches, and check for rot or damage. All of that takes time and money. If a board splits or warps badly, it will need replacing.
Composite costs more to buy but needs very little ongoing work. Most composite decks only need an occasional wash. Over a 20-25 year period, the total cost of owning a composite deck can actually be similar to or lower than a timber one, once you factor in maintenance.
If you are working to a tight budget right now, timber is the more affordable starting point. If you want to spend less time and money on upkeep over the long term, composite is worth the higher initial investment.
Lifespan: Which Lasts Longer?
A well-built composite deck can last 25-30 years or more, and some manufacturers offer warranties of 20-25 years. Composite boards do not rot, warp, or splinter in the same way as wood.
Timber decking, if maintained properly, can last 15-20 years. Hardwood will last longer than softwood without as much treatment, but it costs considerably more to buy. If timber is left without regular care, it can deteriorate much faster, sometimes showing signs of rot or splitting within five to ten years in the UK’s wet climate.
For longevity, composite has the edge.
Maintenance: How Much Work Is Involved?
This is where composite decking really stands out. Most composite boards need very little work to keep them looking good. A brush down and a rinse with a hosepipe a couple of times a year is usually enough. Some composite products have a protective coating that resists staining and fading.
Timber needs much more attention. To keep it looking good and to prevent rot, you should:
- Sweep away debris regularly (leaves left sitting on timber can cause staining and encourage rot)
- Clean the deck thoroughly once or twice a year
- Sand down rough or raised fibres
- Apply a preservative, oil, or decking stain every one to two years
If you skip a few years of maintenance on a timber deck, the deterioration can be noticeable. In the UK, with its wet winters, timber without proper treatment will not last.
For anyone who wants a garden they can enjoy without a lot of upkeep, composite is the better option. The Royal Horticultural Society notes that algae and moss can build up on wooden surfaces like decking and make them slippery, which is an extra reason to keep on top of timber maintenance or choose a composite board with a grooved, anti-slip surface.
Appearance: Which Looks Better?
This comes down to personal preference, but here is a fair assessment of both.
Timber has a warm, natural look that many homeowners love. No two boards are exactly the same, and the grain pattern, knots, and texture give it a character that composite cannot fully replicate. Over time, untreated timber develops a silver-grey patina which some people find attractive and others do not.
Composite has improved enormously in recent years. Many products now closely mimic the look of natural wood grain, and they come in a far wider range of colours than timber. The finish is consistent across every board, which gives a very clean, uniform appearance. Composite will not fade as dramatically as timber and holds its colour well.
If authenticity and a natural feel matter most to you, timber edges it. If you want a neat, consistent finish that holds its look for years, composite is a strong choice.
Slip Resistance: Which Is Safer?
Timber decking can become slippery when wet, especially in autumn and winter when algae and moss begin to build up on the surface. This is a genuine safety concern in the UK climate.
Composite decking boards usually have a grooved or embossed surface that provides better grip underfoot, even in wet weather. Some composite products are specifically designed to be slip-resistant and are suitable for use around pools and in areas where children and elderly people will be walking.
If safety is a priority, composite is the safer choice in most UK conditions.
Which One Should You Choose?
There is no single right answer, but here is a straightforward way to think about it:
Choose composite if you:
- Want a low-maintenance garden
- Plan to stay in your home for many years and want long-lasting results
- Have young children or elderly family members and want a safer, slip-resistant surface
- Want a consistent, uniform finish with a wide choice of colours
Choose timber if you:
- Have a lower upfront budget
- Love the look and feel of natural wood and are happy to maintain it
- Want a material that is easier to repair section by section
- Are planning a shorter-term project
Whatever material you choose, the quality of the installation matters just as much as the material itself. A deck built on a poor subframe with incorrect fixings will not perform well regardless of whether it is composite or timber.
Get Expert Advice on Your Decking Project
We install both composite and timber decking across London and the surrounding areas. Whether you are starting from scratch or replacing an existing deck, our team can advise on the right material for your garden, your budget, and your lifestyle.
View our decking installation service for more information on what we offer, or explore how new decking fits into a broader garden renovation project. You can also see the full range of outdoor services we provide on our landcaping page.
Call us on 0800 696 5890 or get in touch via our contact page for a free quote.