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Table 1. Physical and Performance Requirements for Eave Protection
Property Unit Requirement
Thickness mm ≥ 1.0
Maximum load (Longitudinal or transverse) kN/m ≥ 4.4
Elongation at break of modified bitumen portion % ≥ 10
Adhesion to plywood at 4°C kgf/30.5 cm ≥ 0.92
Adhesion to plywood at 23°C kgf/30.5 cm ≥ 5.44
Thermal stability
Specimens at a 45° angle for 14 days at:
70°C
mm ≤ 3
Flexibility temperature °C −29
(no signs of cracking)
Tear resistance ( Longitudinal or transverse) N ≥ 89
Moisture vapour permeance ng/(Pa·s·m 2) ≤ 5.7
Sealability around nail Pass
Waterproof integrity after low temperature flexibility Pass
Waterproof integrity of lap seam Pass
Slip resistance Greater than asphalt saturated felt when tested under the same conditions of temperature and wetness
Unrolling property The underlayment sheet shall not crack nor be so sticky as to cause tearing or other damage upon being unrolled at material temperatures between 4.4°C and 60°C.