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Table 1 Physical and Performance Requirements for Type 2 Elastomeric Sheet Membrane Roofing
Property Unit Requirements
Measured thickness sheet–overall mm 1.016
Measured thickness coating over scrim or fabric mm 0.38
Breaking strength N ≥ 400
Dynamic puncture resistance -- Pass @ 10 J
Static puncture resistance -- Pass @ 25 kg
Elongation ultimate % ≥ 250
Elongation at fabric break ultimate - MD Footnote (1) % ≥ 15
Elongation at fabric break ultimate - XD Footnote (1) % ≥ 15
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
Factory seam strength kN/m ≤ 8.8
Weather resistance - visual inspection -- No cracks or crazing