Composite Decking vs Timber Decking: The 2026 Comparison Every UK Homeowner Needs

Two Materials, Two Very Different Lifetimes

Timber decking is traditional, warm, and natural - but it's also a maintenance commitment. Composite decking is engineered from recycled wood fibre and plastic, designed to look like timber without the upkeep. The choice between them shapes your garden for the next 20 to 30 years.

Upfront Cost

Pressure-treated softwood decking costs around £25-£40/m² for boards alone. Hardwoods like Iroko or Yellow Balau run £80-£150/m². Quality composite decking sits between the two at roughly £45-£90/m². So timber wins on initial price - but that's only half the story.

True Cost Over 15 Years

Softwood decking needs annual cleaning, sanding every 2-3 years, and re-staining or oiling each year. Over 15 years, you'll spend £400-£800 on treatments alone, plus board replacements as rot sets in. Composite decking needs only an occasional wash - no oil, no sanding, no rot. Over 15 years, composite typically works out cheaper than timber, even at a higher upfront price.

Maintenance Reality

British weather is hard on wood. Constant wet-dry cycles cause cracking, warping, and splintering. Algae and mould blacken the surface every winter. Composite decking has none of these issues - it doesn't absorb water, doesn't feed mould, and never needs treating. A jet wash twice a year is all most composite decks need.

Appearance and Feel

Modern co-extruded composite decking has a wood-grain embossing and multi-tonal colour that genuinely passes for hardwood at a glance. Capped composite (with a protective polymer shell) resists fading and staining far better than first-generation composite boards. Timber, of course, has unmatched natural variation - but it greys to silver within 12 months unless treated.

Slip Resistance and Safety

Wet timber is notoriously slippery. Most modern composite decking boards include a textured or grooved surface for grip and meet UK slip resistance ratings. Families with children or older relatives often choose composite specifically for this reason.

Which Should You Choose?

Choose timber if you love the natural look, enjoy the annual ritual of oiling, and want the cheapest upfront option. Choose composite if you want a decking that looks great in year 20, costs less over its lifetime, and frees your weekends from sanding and staining.