Home / Wood Compare / Thermowood Larch ThermoD vs Thermowood Radiata Pine ThermoD
Professional Comparison · Verified Engineering Data · Updated 19 July 2026
Thermowood Larch ThermoD VS Thermowood Radiata Pine ThermoD
Which wood is better for your project? Scores are computed from the verified figures on each species page — how we score.
🥇
Thermowood Larch ThermoD
31/100 Library Score
🌲Softwood🌧Outdoor
- Stronger in bending (MOR 75.0 vs 62.0 MPa)
🥈
Thermowood Radiata Pine ThermoD
19/100 Library Score
🌲Softwood🌧Outdoor🌿Sustainable
- Lighter (0.5 vs 0.55 g/cm³)
- Harder wear surface
- Solid choice where its profile fits the project
Visual comparison
Thermowood Larch ThermoDThermowood Radiata Pine ThermoD
Winner by category
There isn't one universally best wood — there's a best wood for each purpose.
| Category | Winner |
|---|---|
| Durability | Tie |
| Stability | Tie |
| Hardness | Thermowood Radiata Pine ThermoD |
| Strength (MOR) | Thermowood Larch ThermoD |
| Stiffness (MOE) | Thermowood Larch ThermoD |
| Flame spread | Tie |
| Machining ease | Tie |
| Lightness | Thermowood Radiata Pine ThermoD |
Engineering data
| Property | Thermowood Larch ThermoD | Thermowood Radiata Pine ThermoD |
|---|---|---|
| Janka Hardness | 530ITWA lbf | 710ITWA lbf |
| Density | 0.55ITWA g/cm³ | 0.5ITWA g/cm³ |
| MOE | 11.0ITWA GPa | 9.0ITWA GPa |
| MOR | 75.0ITWA MPa | 62.0ITWA MPa |
| Durability | Class 2 Durable (treated) | Class 2 Durable (treated) |
| Stability | Moderate | Moderate |
| Fire (E84) | Class C indicative | Class C indicative |
| Radial Shrink | 1.3ITWA % | 1.2ITWA % |
| Tangential Shrink | 2.8ITWA % | 2.6ITWA % |
| T/R Ratio | 2.15 | 2.17 |
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 | 🥇 Thermowood Larch ThermoD | ★★★☆☆ |
| Exterior cladding | 🥇 Thermowood Radiata Pine ThermoD | ★★★☆☆ |
| Flooring / wear surfaces | 🥇 Thermowood Radiata Pine ThermoD | ★★☆☆☆ |
| Furniture / interior joinery | 🥇 Thermowood Larch ThermoD | ★★★☆☆ |
| Structural / load-bearing | 🥇 Thermowood Larch ThermoD | ★★☆☆☆ |
Advantages & limitations
Thermowood Larch ThermoD
Advantages
- Rated for exterior exposure (EN 350 Class 2)
- Easy to machine, glue and fasten
Limitations
- Noticeable seasonal movement — allow for it in design
- Soft surface — dents under point loads
Thermowood Radiata Pine ThermoD
Advantages
- Rated for exterior exposure (EN 350 Class 2)
- Easy to machine, glue and fasten
- Lightweight — easy handling and installation
Limitations
- Noticeable seasonal movement — allow for it in design
- Soft surface — dents under point loads
Recommendation
Choose Thermowood Larch ThermoD if…
- You want the stronger all-round engineering profile
Choose Thermowood Radiata Pine ThermoD if…
- Weight matters — ceilings, wall panels, transport
- You need the harder wear surface
- Its profile matches the application better than a single overall score
Frequently asked questions
Which is more durable, Thermowood Larch ThermoD or Thermowood Radiata Pine ThermoD?
Neither — both carry the same EN 350 rating (Class 2, Durable (treated)). For outdoor decisions between them, weigh dimensional stability and hardness instead.
Which wood is better for outdoor use?
They are closely matched outdoors — durability and stability come out almost level. Let the application decide: harder surface for decking traffic, lighter weight for cladding.
Is Thermowood Larch ThermoD harder than Thermowood Radiata Pine ThermoD?
No — Thermowood Radiata Pine ThermoD is harder (Janka 710 vs 530 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.