How long should decking last?

Properly maintained timber decking often lasts 15–25 years, while quality composite decking can exceed 30 years, though this depends on installation quality, exposure and how well it is maintained.

How often should I clean my decking?

Most decking benefits from an annual clean in spring, with occasional spot cleaning during the year to remove algae, leaves and debris that trap moisture.

Do I need to oil or stain composite decking?

No — composite decking does not require oiling or staining, which is one of its main advantages over timber. It still needs regular cleaning to prevent surface grime and algae build-up.

How can I stop my decking becoming slippery?

Regular cleaning to remove algae and moss is the main defence. Anti-slip decking oil, strips or grit additives can also help, particularly on shaded or north-facing decking.

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Homeowner Hub › Garden & Outdoor Living › Decking Care

Decking Care

Maintain timber and composite decking to maximise lifespan and safety. Guides cover cleaning, staining, oiling, replacing boards and slip prevention.

Last reviewed: August 2026 · Reviewed by: The TopTenTrades Editorial Team

Quick Answer

1.Clean decking annually to remove algae, moss and debris
2.Oil or stain timber decking every one to two years depending on exposure
3.Check boards, joists and fixings for damage each spring
4.Replace individual damaged boards promptly rather than waiting
5.Use anti-slip treatments on shaded or frequently damp decking

Best time: Spring
Typical frequency: Annually
DIY friendly: Yes
Professional recommended: Optional — recommended for structural repairs or large replacements
Typical cost: £250–£1,000
Recommended trade: Carpenter / Decking Installer

Maintaining Timber And Composite Decking

Decking needs a different maintenance approach depending on the material. Regular care extends its lifespan significantly and keeps it safe underfoot.

•Cleaning — remove algae, leaves and grime with a deck cleaner and stiff brush or gentle pressure wash
•Staining — refresh colour and add UV protection to timber decking
•Oiling — nourishes timber and helps repel water, typically needed every one to two years
•Replacing boards — swap out individual damaged or rotten boards rather than replacing the whole deck
•Slip prevention — anti-slip treatments and regular cleaning reduce the risk in damp or shaded areas

Decking Care: Typical Costs

Service	Typical Cost (UK)
Deep clean	£100–£250
Staining or oiling	£150–£400
Board replacement (per board)	£40–£90
Full deck restoration	£400–£1,000

Composite decking generally costs more to install but less to maintain over time than timber.

Extending The Life Of Your Decking

•Sweep regularly and clear leaves before they trap moisture
•Check joists and fixings underneath the deck annually
•Re-oil or re-stain timber before the existing finish fully wears away
•Keep planters and furniture feet raised slightly to allow airflow underneath

Need help maintaining or repairing your decking?

Find local carpenters who can help with:

Deck cleaning
Staining and oiling
Board replacement
Structural repairs

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