How do I prevent timber cladding from going grey?

All untreated timber exposed to UV radiation will silver to a grey patina over time — this is a natural surface weathering process that does not affect structural integrity. To prevent greying: apply UV-protective oil or stain (reapply every 2–5 years), use factory-applied opaque or semi-transparent coatings, or specify pre-greyed/pre-weathered products for immediate uniform appearance.

All untreated timber exposed to UV radiation will silver to a grey patina over time — this is a natural surface weathering process that does not affect structural integrity. To prevent greying: apply UV-protective oil or stain (reapply every 2–5 years), use factory-applied opaque or semi-transparent coatings, or specify pre-greyed/pre-weathered products for immediate uniform appearance. Alternatively, embrace the silver patina as a design feature — many architects specify untreated larch or cedar specifically for this aesthetic.

Why this matters

This question relates to Timber Cladding Systems: Types, Profiles & Specification Guide, 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 Cladding Systems: Types, Profiles & Specification Guide

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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.