How does spruce perform in fire?

Norway Spruce has a one-dimensional charring rate of 0.65 mm/min under EN 1995-1-2, identical to Scots Pine. Its Euroclass reaction to fire rating is D-s2, d0 (untreated).

Norway Spruce has a one-dimensional charring rate of 0.65 mm/min under EN 1995-1-2, identical to Scots Pine. Its Euroclass reaction to fire rating is D-s2, d0 (untreated). The predictable charring behaviour allows structural engineers to design for 30, 60, or 90-minute fire resistance by calculating residual cross-sections. CLT panels made from spruce can achieve 90-minute fire resistance with appropriate panel thickness and protective layers.

Why this matters

This question relates to Norway Spruce for Construction: Grade Properties & Specification, 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:

→ Norway Spruce for Construction: Grade Properties & Specification

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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.