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From [Institution name]
| Property | Unit | Requirements |
|---|---|---|
| Thermal resistance of a 25-mm-thick specimen | m 2·°C/W | ≥ 0.74 |
| Long-term thermal resistance Footnote (1) | m 2·°C/W | ≥ 1.73 |
| Water vapour permeance for a 25-mm-thick specimen | ng/(Pa·s·m 2) | ≤ 130 |
| Dimensional stability | % linear change | ≤ 1.5 |
| Flexural strength | kPa | ≥ 300 |
| Water absorption | % by volume | ≤ 2.0 |
| Compressive strength | kPa | ≥ 140 |
| Limiting oxygen index | % | ≥ 24 |