Scots Pine VS Spruce-Pine-Fir SPF
- Stronger in bending (MOR 83.0 vs 63.0 MPa)
- Easier to machine and fasten
- Lighter (0.42 vs 0.49 g/cm³)
- Solid choice where its profile fits the project
Visual comparison
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 | Scots Pine |
| Strength (MOR) | Scots Pine |
| Stiffness (MOE) | Scots Pine |
| Flame spread | Tie |
| Machining ease | Spruce-Pine-Fir SPF |
| Lightness | Spruce-Pine-Fir SPF |
Engineering data
| Property | Scots Pine | Spruce-Pine-Fir SPF |
|---|---|---|
| Janka Hardness | 540WD lbf | 510grade lbf |
| Density | 0.49WD g/cm³ | 0.42grade g/cm³ |
| MOE | 10.1WD GPa | 9.5grade GPa |
| MOR | 83.0WD MPa | 63.0grade MPa |
| Durability | Class 4 Slightly Durable | Class 4 Slightly Durable |
| Stability | Excellent | Excellent |
| Fire (E84) | Class C indicative | Class C indicative |
| Radial Shrink | 5.2WD % | 4.4grade % |
| Tangential Shrink | 8.3WD % | 7.4grade % |
| T/R Ratio | 1.6 | 1.68 |
Figures carry the same source status as the species pages they come from — verified where cited, indicative where marked.
Best for
| Application | Recommended | Suitability |
|---|---|---|
| Exterior cladding | 🥇 Spruce-Pine-Fir SPF | ★★★☆☆ |
| Flooring / wear surfaces | 🥇 Scots Pine | ★★☆☆☆ |
| Furniture / interior joinery | 🥇 Spruce-Pine-Fir SPF | ★★★★☆ |
| Structural / load-bearing | 🥇 Scots Pine | ★★☆☆☆ |
Advantages & limitations
Scots Pine
Advantages relative to Spruce-Pine-Fir SPF
- MOR is 83 MPa vs 63 MPa, about 32% higher
Limitations relative to Spruce-Pine-Fir SPF
Spruce-Pine-Fir SPF
Advantages relative to Scots Pine
Limitations relative to Scots Pine
- MOR is 63 MPa vs 83 MPa, about 24% lower
Recommendation
Choose Scots Pine if…
- Construction and general building, windows and doors (treated) and external joinery where the higher bending strength matters in specification and the shared Class 4 durability and Class C fire class are the baseline
- Flooring, vehicle bodies, railway sleepers and telephone poles where the stronger softwood profile is what the piece needs
Choose Spruce-Pine-Fir SPF if…
- House construction and wall framing, trusses, joists and rafters, general framing and carcassing where the working properties are sufficient and cost or availability is the deciding factor
- Interior projects and panelling, and remanufacture into furniture, mouldings, crates and pallets where the documented SPF construction role is what the project is specifying
Frequently asked questions
Which is more durable, Scots Pine or Spruce-Pine-Fir SPF?
Neither — both carry the same EN 350 rating (Class 4, Slightly Durable). For outdoor work the separation is movement, not decay: Spruce-Pine-Fir SPF moves 7.4% tangentially against 8.3%, which decides board width and fixing spacing more than the durability class does.
Which wood is better for outdoor use?
Both are EN 350 Class 4, and tangential movement runs 8.3% for Scots Pine against 7.4% for Spruce-Pine-Fir SPF — close enough that decay resistance will not choose between them, and Spruce-Pine-Fir SPF holds its dimension marginally better. Hardness is effectively level (540 vs 510 lbf), so choose on weight.
Is Scots Pine harder than Spruce-Pine-Fir SPF?
Yes — Janka 540 lbf vs 510 lbf.