Europe & Pacific North-West
Douglas Fir
Pseudotsuga menziesii
Durability
34EN 350
15 yrs modelled mean service life
Stability
50WI-INTERNAL
Stability rating: Moderate
Fire performance
50EN 13501-1 / EN 1995-1-2
β₀ = 0.65 mm/min · D-s2,d0
Carbon stored
86EN 16449
855 kg CO₂e/m³ stored
Natural durability
69
Maintenance Profile
Use classes untreated
UC
Typical Use Classes
- Density
- 530 kg/m³
- Bending strength
- 91 N/mm²
- Stability
- Moderate
- Carbon stored
- 0.86 t CO₂e/m³
- Durability
- DC 3–4 (moderately to slightly durable)
- Service life
- 20–35 yrs façade
- Fire performance
- Euroclass D-s2,d0 · charring 0.65 mm/min
- Cost index
- 52
The figures above are WoodIntel editorial estimates for orientation only. Where a standards-referenced record exists for this species, it is shown below with full provenance.
Standards-referenced record
Douglas Fir, as the standards define it
Each value below carries its derivation and the standard it comes from. Tap a marker to open the provenance.
- Density at 12 % MC
- 530kg/m³
- Natural durability
- DC 3
- Use classes untreated
- UC 1–3 (heartwood)
- Reaction to fire
- D-s2,d0
- Design charring rate
- 0.65mm/min
- Biogenic carbon stored
- 855kg CO₂e/m³
ProvenancemeaMeasuredpubPublishedderDerivedestModel estimate
Colour ageing
Pink-amber → grey with resin darkening in 2–3 years
Typical applications
- Cladding
- Glulam
- Structural framing
- Soffits
AI recommendation
Strong structurally for its weight and widely available in long lengths. Heartwood durability varies with growth rate — specify slow-grown heartwood and exclude sapwood on exposed elevations.