Silver Birch VS White Ash
- Leads on bending strength, stiffness, machining ease — a narrow but consistent edge
- Harder wear surface
- 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 | White Ash |
| Strength (MOR) | Silver Birch |
| Stiffness (MOE) | Silver Birch |
| Flame spread | Tie |
| Machining ease | Silver Birch |
| Lightness | Tie |
Engineering data
| Property | Silver Birch | White Ash |
|---|---|---|
| Janka Hardness | 1210WD lbf | 1320WD lbf |
| Density | 0.61WD g/cm³ | 0.6FPL g/cm³ |
| MOE | 14.0WD GPa | 12.0FPL GPa |
| MOR | 114.3WD MPa | 106.0FPL MPa |
| Durability | Class 5 Not Durable | Class 5 Not Durable |
| Stability | Excellent | Excellent |
| Fire (E84) | Class B indicative | Class B indicative |
| Radial Shrink | 5.3 % | 4.9WD % |
| Tangential Shrink | 7.8 % | 7.8WD % |
| T/R Ratio | 1.47 | 1.59 |
Figures carry the same source status as the species pages they come from — verified where cited, indicative where marked.
Best for
| Application | Recommended | Suitability |
|---|---|---|
| Flooring / wear surfaces | 🥇 White Ash | ★★★★☆ |
| Furniture / interior joinery | 🥇 Silver Birch | ★★★☆☆ |
| Structural / load-bearing | 🥇 Silver Birch | ★★★★☆ |
Advantages & limitations
Silver Birch
Advantages relative to White Ash
- MOE is 14.0 GPa vs 12.0 GPa, about 17% higher
Limitations relative to White Ash
White Ash
Advantages relative to Silver Birch
Limitations relative to Silver Birch
- MOE is 12.0 GPa vs 14.0 GPa, about 14% lower
Recommendation
Choose Silver Birch if…
- Flooring, doors, cabinets and interior joinery where the higher stiffness is what the span or loading demands and the shared Class 5 durability limits the use to interior service
- Plywood, veneer and turned parts where the stiffer core matters in the assembly
Choose White Ash if…
- Furniture, architectural millwork and kitchen cabinets where the working properties are sufficient and the piece will not see high span or loading
- Tool handles, baseball bats, oars and sporting equipment where the documented shock-absorbing character of white ash is the deciding factor
Frequently asked questions
Which is more durable, Silver Birch or White Ash?
Neither — both carry the same EN 350 rating (Class 5, Not Durable). Outdoors, movement will not separate them either — 7.8% against 7.8% tangential. The practical difference is weight: Silver Birch runs 0.61 g/cm³ against 0.60, so White Ash is the easier fix overhead and the cheaper one to freight.
Which wood is better for outdoor use?
Both are EN 350 Class 5, and tangential movement runs 7.8% for Silver Birch against 7.8% for White Ash — close enough that decay resistance will not choose between them, and White Ash holds its dimension marginally better. White Ash gives the harder wearing surface at 1,320 lbf; White Ash is the lighter section at 0.60 g/cm³ — traffic favours the first, cladding and handling the second.
Is Silver Birch harder than White Ash?
No — White Ash is harder (Janka 1320 vs 1210 lbf).