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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 can be
installed without the need for roof space ventilation, and 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 BS5534-2003 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’.
Technical Data: |
| Property |
Units |
Value |
| Weight |
g/m² |
122 |
| Water Vapour Resistance |
Sd (M) MN/sg |
c.0.02 0.19 |
| Water Vapour Transmission |
g/m²/24 hr |
1065 |
| Fire Rating |
- |
EN13501-1 |
| Exposure Times UV Degradation |
- |
3/4 months |
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