Highly vapour permeable, but completely airtight.
Completely watertight >7.0m water resistance.
Strongest underlay in its class/weight range.
UV and heat resistant.
Tough and durable.
Can be used as temporary roof covering.
Has unrestricted use for wind uplift in all exposure conditions in the UK and Ireland. Suitable for zones 1-5 at 345mm batten gauge.
Helps to avoid condensation risk in the roof space in accordance with BS 5250 and NHBC requirements.