VapR-free Xtra 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 is suitable for both Commercial and Domestic buildings, it is the ideal roof underlay for Warm and Cold Pitched Roofs.
VapR-free Xtra membrane has received BBA Approval and complies with BS5534-2014 Code of Practice for slating and tiling and NFRCTB6.
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’.
|Water Vapour Resistance||Sd (M)||c.0.02|
|Water Vapour Transmission ||g/m²/24hr||1065|
|Exposure Times UV Degradation||-||3 months|