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Table 1 Physical and Performance Requirements for Type 3 Elastomeric Sheet Membrane Roofing
Property Unit Requirements
Measured thickness coating over scrim or fabric mm 0.76
Breaking strength N ≥ 400
Elongation ultimate % ≥ 300
Tearing strength   ≥ 45
Brittleness point °C –45
Ozone resistance, on cracks -- Pass
Heat aging - breaking strength N ≥ 356
Heat aging - elongation, ultimate % ≥ 200
Heat aging - linear dimensional change % ≤ ± 1
Water absorption mass % ≤ +8, –2 of original
Weather resistance - visual inspection -- No cracks or crazing
Fabric adhesion N 525