breathable roof foil water resistance/ waterproof vapour permeability Breathable membrane pitched roofing underlay
Breathable Roof foil -- breathable membrane
Pitched roofing underlayment
waterproof and breathable foil
1.Breathable membrane Characteristics
A.Excellent Performance at water resistance
B.Particular function of vapour permeability, so called Breathable membrane
C.Good performance at UV resistance
D.Tear resistance, wear resistance, good extensibility.
E.Light and thin, antiskid, with good low temperature flexibility, suitable for construction in different condition.
F.The 100% returnable polymer materials, fit the ecologist requirements.
2.Functions of Breathable membrane
A.Improve watertightness of building, prevent the construction from the invasion of wind and rain, protecting the structural materials and equipments inside roof and wall.
B.Improve the energy saving and insulation effect. Due to the unique water proof and vapour permeable performance, when forming the protection to the insulating layer, it can also effectively avoid the negative influence from the temperature difference between interior and exterior. hence, it increasing the effects of insulation and energy saving as well as providing the continuously energy saving
C. Shorten the construction period. Thanks to the good water resistant performance, interior construction and exterior can be performed at the same time so that shorten the construction period, reduce the construction cost.
D. Improve the residential environment. Because of the special breathable function, the interior vapour can natural exhaust, will effectively avoid mould and condensation, keep dry, permeate and comfortable indoor, improve the residential environment.
3. Application of Breathable membrane
Mainly used as underlay for pitched roof and enclosure protection for insulating layer of walls.
A. Roofing application
B. Wall application
| Characteristics | Unit | Test method | MF140 |
| Length | m | EN1848 | 50 |
| Width | m | EN1848 | 1.5(-0.5%;+1.5%) |
| Mass per unit area | g/m2 | EN1849 | 140g(± 10%) |
| Resistance to water penetration | ---- | EN1928-2000 | W1 |
| Water vapour transmission | g/m2/24h | EN1931 | 2250 |
| Tensile strength MD/ CD | N/50mm | EN12311-1 | 200±10% / 150±10% |
| Resistance to tearing MD/CD | N | EN12310-1 | 100±10% / 90±10% |
| UV resistance | Month(s) | EN1296, EN1297, EN13859-1 | 3 |
| Reaction to fire | ---- | EN13501-1:2002,EN11925-2 | E |
| Properties alternation after artificial aging | |||
| Tensile strength MD/CD | % | EN13859-1 EN12311-1 | -30%/-30% |
| Resistance to water penetration | ---- | EN13859-1 EN1928-2000 | W1 |
breathable roof foil
