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Table 1. CAN/ULC-S701-11Footnote (1) Material Properties
Property Unit Requirement
Thermal resistance of a 25-mm-thick specimen m2·°C/W ≥ 0.65
Long-term thermal resistance Footnote (2) m2·°C/W ≥ 1.68
Water vapour permeance for a 25-mm-thick specimen ng/(Pa·s·m2) ≤ 300
Dimensional stability % linear change ≤ 1.5
Flexural strength kPa ≥ 170
Water absorption % by volume ≤ 6.0
Compressive strength kPa ≥ 70
Limiting oxygen index % ≥ 24