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Table 1. CAN/ULC-S701-05 Type 3 Material Properties
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