Home / Wood Compare / Iroko vs Accoya Acetylated Radiata Pine
Professional Comparison · Verified Engineering Data · Updated 19 July 2026
Iroko VS Accoya Acetylated Radiata Pine
Which wood is better for your project? Scores are computed from the verified figures on each species page — how we score.
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Iroko
82/100 Library Score
🪵Hardwood🌧Outdoor💧Moisture Stable
- Harder wear surface (Janka 1260 vs 710 lbf)
- Stronger in bending (MOR 85.5 vs 60.0 MPa)
- Better flame-spread class (Class B vs Class C)
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Accoya Acetylated Radiata Pine
68/100 Library Score
🌲Softwood🌧Outdoor💧Moisture Stable🌿Sustainable
- Easier to machine and fasten
- Lighter (0.51 vs 0.55 g/cm³)
- More stable in service
- Solid choice where its profile fits the project
Visual comparison
IrokoAccoya Acetylated Radiata Pine
Winner by category
There isn't one universally best wood — there's a best wood for each purpose.
| Category | Winner |
|---|---|
| Durability | Tie |
| Stability | Accoya Acetylated Radiata Pine |
| Hardness | Iroko |
| Strength (MOR) | Iroko |
| Stiffness (MOE) | Iroko |
| Flame spread | Iroko |
| Machining ease | Accoya Acetylated Radiata Pine |
| Lightness | Accoya Acetylated Radiata Pine |
Engineering data
| Property | Iroko | Accoya Acetylated Radiata Pine |
|---|---|---|
| Janka Hardness | 1260WD lbf | 710 lbf |
| Density | 0.55FPL g/cm³ | 0.51 g/cm³ |
| MOE | 10.1FPL GPa | 8.5 GPa |
| MOR | 85.5FPL MPa | 60.0 MPa |
| Durability | Class 1 Very Durable | Class 1 Very Durable (treated) |
| Stability | Excellent | Exceptional |
| Fire (E84) | Class B indicative | Class C indicative |
| Radial Shrink | 2.8WD % | 0.7 % |
| Tangential Shrink | 3.8WD % | 1.5 % |
| T/R Ratio | 1.36 | 2.14 |
Figures carry the same source status as the species pages they come from — verified where cited, indicative where marked.
Best for
| Application | Recommended | Suitability |
|---|---|---|
| Outdoor decking / pergola | 🥇 Accoya Acetylated Radiata Pine | ★★★★★ |
| Exterior cladding | 🥇 Accoya Acetylated Radiata Pine | ★★★★★ |
| Flooring / wear surfaces | 🥇 Iroko | ★★★★☆ |
| Furniture / interior joinery | 🥇 Accoya Acetylated Radiata Pine | ★★★★☆ |
| Structural / load-bearing | 🥇 Iroko | ★★☆☆☆ |
| Sauna / wet interiors | 🥇 Accoya Acetylated Radiata Pine | ★★★★★ |
Advantages & limitations
Iroko
Advantages
- Rated for exterior exposure (EN 350 Class 1)
- Very low movement in service
Limitations
- Few practical drawbacks within its intended uses
Accoya Acetylated Radiata Pine
Advantages
- Rated for exterior exposure (EN 350 Class 1)
- Very low movement in service
Limitations
- Soft surface — dents under point loads
Recommendation
Choose Iroko if…
- The surface takes traffic or impact
Choose Accoya Acetylated Radiata Pine if…
- Ease of working and fastening matters
- Weight matters — ceilings, wall panels, transport
- Its profile matches the application better than a single overall score
Frequently asked questions
Which is more durable, Iroko or Accoya Acetylated Radiata Pine?
Neither — both carry the same EN 350 rating (Class 1, Very Durable). For outdoor decisions between them, weigh dimensional stability and hardness instead.
Which wood is better for outdoor use?
Accoya Acetylated Radiata Pine — outdoor performance combines decay durability with dimensional stability, and it leads on that combination.
Is Iroko harder than Accoya Acetylated Radiata Pine?
Yes — Janka 1260 lbf vs 710 lbf.
How we score. Each wood gets a weighted composite of the verified figures shown above: durability 22%, stability 18%, hardness 12%, bending strength 12%, machining ease 12%, stiffness 8%, flame spread 8%, lightness 8%. The Library Score is that composite's percentile rank within our 60-species library — 50 means the library median, 90 means it outperforms nine of every ten species we cover. No price data is scored — cost guidance is qualitative. The score summarises the data; it does not replace judgement about your specific application.