resist insulation condensation Property Unit Value Mass per unit area g/m2 113 Thickness mm 0.30 Water vapour transmission g/m2.24h 1000 Water vapour transmission (us) perm 63 Water vapour transmission ng/Pa/s/m² 3591 Watertightness W1 Maximum tensile force (MD/CD) N/50mm 232/156 Elongation (MD/CD) % 70/107 Resistance to tearing MD/CD (nail shank) N 140/130 Flexibility at low temperature - 40 Reaction to fire F Artificial ageing by UV and heat ï¼?80 Ã?168hï¼? Anti UV months 4 Minimum recommended pitch ° 20 Width m 1.5