How long does timber decking last?

Lifespan depends on species, maintenance, and detailing. Pressure-treated softwood (pine): 15–25 years.

Lifespan depends on species, maintenance, and detailing. Pressure-treated softwood (pine): 15–25 years. European Larch (untreated): 20–30 years. Thermally modified timber: 25–40 years. Western Red Cedar: 25–35 years. Tropical hardwoods (Ipe, Cumaru): 40–60+ years. These figures assume correct installation with ventilated subframe, adequate drainage, and appropriate maintenance. Poor detailing (trapped moisture, ground contact) can halve these lifespans.

Why this matters

This question relates to Timber Decking Specification: Durability Classes & Species Selection, which covers the broader topic in detail. Understanding this specific aspect helps architects, builders, and timber dealers make informed specification decisions.

For full context and additional technical detail, see our comprehensive guide:

→ Timber Decking Specification: Durability Classes & Species Selection

Related questions

• What durability class is required for timber decking?
• Is larch or thermowood better for decking?
• What profile should I specify for decking boards?

About this answer

This answer is part of the PuurModulair Knowledge Base — comprehensive timber specification guidance for architects, builders, and dealers across the UK, EU, and Scandinavia.