Allows the roof structure to breathe yet fully waterproof.
Performance
Water Vapour Permeability BS3177 (gm2/day): 1149
Water Vapour Resistance BS3177 (MNs/g): 0.18
Tensile Strength :BS2782-3.320A
Longitudinal (N/5cm): 264
Transverse (N/5cm): 210
Nail tear Strength: MOAT27:5.4.1
Longitudinal (N): 116
Transverse (N): 96
Installation
Permo Light should be laid in accordance with our installation details set out in our Permo Product Guide and BBA Certificate.