How long does larch cladding last without treatment?

Untreated European Larch cladding has a proven service life of 50–80+ years when correctly detailed and installed. Historic buildings in Alpine regions demonstrate larch cladding surviving 100+ years.

Untreated European Larch cladding has a proven service life of 50–80+ years when correctly detailed and installed. Historic buildings in Alpine regions demonstrate larch cladding surviving 100+ years. The key factors are: heartwood-only specification, adequate ventilation behind the cladding (minimum 25 mm cavity), proper end-grain protection, and acceptance of the natural silver-grey weathered appearance that develops over 2–5 years of exposure.

Why this matters

This question relates to European Larch: Natural Durability, Cladding & Structural Applications, 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:

→ European Larch: Natural Durability, Cladding & Structural Applications

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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.