Home / Wood Compare / Thermowood Pine ThermoD vs Thermowood Spruce ThermoD
Professional Comparison · Verified Engineering Data · Updated 19 July 2026
Thermowood Pine ThermoD VS Thermowood Spruce ThermoD
Which wood is better for your project? Scores are computed from the verified figures on each species page — how we score.
🥇
Thermowood Pine ThermoD
32/100 Library Score
🌲Softwood🌧Outdoor
- Harder wear surface (Janka 540 vs 380 lbf)
🥈
Thermowood Spruce ThermoD
21/100 Library Score
🌲Softwood🌧Outdoor
- Easier to machine and fasten
- Solid choice where its profile fits the project
Visual comparison
Thermowood Pine ThermoDThermowood Spruce 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 Pine ThermoD |
| Strength (MOR) | Thermowood Pine ThermoD |
| Stiffness (MOE) | Thermowood Pine ThermoD |
| Flame spread | Tie |
| Machining ease | Thermowood Spruce ThermoD |
| Lightness | Thermowood Spruce ThermoD |
Engineering data
| Property | Thermowood Pine ThermoD | Thermowood Spruce ThermoD |
|---|---|---|
| Janka Hardness | 540ITWA lbf | 380ITWA lbf |
| Density | 0.48ITWA g/cm³ | 0.45ITWA g/cm³ |
| MOE | 9.5ITWA GPa | 9.0ITWA GPa |
| MOR | 65.0ITWA MPa | 60.0ITWA MPa |
| Durability | Class 2 Durable (treated) | Class 2 Durable (treated) |
| Stability | Moderate | Moderate |
| Fire (E84) | Class C indicative | Class C indicative |
| Radial Shrink | 1.2ITWA % | 1ITWA % |
| Tangential Shrink | 2.5ITWA % | 2.2ITWA % |
| T/R Ratio | 2.08 | 2.2 |
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 Pine ThermoD | ★★★☆☆ |
| Exterior cladding | 🥇 Thermowood Spruce ThermoD | ★★★★☆ |
| Flooring / wear surfaces | 🥇 Thermowood Pine ThermoD | ★★☆☆☆ |
| Furniture / interior joinery | 🥇 Thermowood Spruce ThermoD | ★★★☆☆ |
| Structural / load-bearing | 🥇 Thermowood Pine ThermoD | ★☆☆☆☆ |
Advantages & limitations
Thermowood 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
Thermowood Spruce 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 Pine ThermoD if…
- The surface takes traffic or impact
Choose Thermowood Spruce ThermoD if…
- Ease of working and fastening matters
- Its profile matches the application better than a single overall score
Frequently asked questions
Which is more durable, Thermowood Pine ThermoD or Thermowood Spruce 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 Pine ThermoD harder than Thermowood Spruce ThermoD?
Yes — Janka 540 lbf vs 380 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.
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