VapR-free Xtra

VapR-free Xtra All Zones is a multi layer laminate film composite made of polyolefin materials, resulting in a pitched roof underlay that has high vapour permeability but is also highly water resistant.

VapR-free Xtra All Zones has been approved for use in all 5 wind speed zones due to the unique integral acrylic tape that is applied when produced.

VapR-free Xtra All Zones is suitable for both Commercial and Domestic buildings, it is the ideal roof underlay for Warm and Cold Pitched Roofs.

VapR-free Xtra All Zones membrane has recieved BBA Approval and complies with  BS5534: 2014 Code of Practice for slating and tiling for pitched roofs.

Recommendations for the use of vapour permeable membranes in pitched roofs are contained in BS5250 : 2002 ‘Code of practice for control of condensation in buildings’.

Roof Space Ventilation

The NHBC require that for all New Build Homes, ridge or high level ventilation is installed when a vapour permeable membrane such as VapR-free Xtra is used.

Roof Space Ventilation is not required for other warm or cold pitch roofs but ridge or high level ventilation for tight fitting tiles and slates will assist any moisture vapour to disperse more easily when air temperatures are very low.

Technical Data

PropertyUnitsValue
Weightg/m²122
Water Vapour ResistanceSd (M)c.0.02
MN/sg0.19
Water Vapour Transmission
g/m²/24hr1065
Fire Rating-EN13501-1
Exposure Times UV Degradation-3 months