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| The sawdust solution | ||||
| Decay | Stiffness | Expansion | Conductivity | |
| Aluminium | 0% | N/A | 2.3 | 158.87 |
| Fibrex | 0% | 56,000 | 2.2 | 0.173 |
| PVC-U | 0% | 28,000 | 7.2 | 0.173 |
| Treated pine | 10%* | 70,000 | 0.45 | 0.121 |
| * Untreated pinewood decays by 50% | ||||