0840
Breather Membrane
W1
Class E – EN 13501-1
OBEX CORTEX 0840 Breather Membrane is built to make your job easier. This tough, 3-layer membrane delivers reliable weather protection while letting trapped moisture escape – keeping the structure dry, protected, and ready for the next stage of your build. Read More
-
Breathable
-
W1 - EN 13859-2
OBEX CORTEX 0840 Breather Membrane is built to make your job easier. This tough, 3-layer membrane delivers reliable weather protection while letting trapped moisture escape – keeping the structure dry, protected, and ready for the next stage of your build.
Designed with versatility in mind, it can be left exposed for up to 3 months, giving you breathing room in your installation schedule without holding up progress on site. Lightweight and easy to handle, it installs quickly and performs consistently in both commercial and residential projects.
Built with contractors in mind
- Fast to fit – lightweight, easy to handle and cut
- On your schedule – UV resistant for up to 3 months’ exposure
- Reliable performance – highly breathable and weather-resistant
- Flexible solutions – available in variable widths
- Brand it your way – custom printing (subject to MOQ)
- Fully compliant – DTU compliant for France
- Extra tough – superior UV resistance
Typical applications
- Walls – with or without sheathing
- Roofs – as per design
Width
1500mm
Length
50m
Thickness
0.5mm
Colour
Grey (standard), Blue, Red, Grey, Green colours are available subject to MOQ.
Harmonised Standard
EN 13859-2
Fire Classification | EN 13501-1
E
Watertightness | EN 1928
W1
Sd value | EN ISO 12572
0.03m
UV Resistance | EN 1297
3 months
Tensile Strength | EN 12311-2
Longitudinal: 226 N / 50mm, Transverse: 135 N / 50mm
Elongation | EN 12311-2
Longitudinal: 44%, Transverse: 94%
Tear Strength (Nail Shank) | EN 12310-1
Longitudinal: 104 N, Transverse: 126 N
Low temperature flexibility | EN 1109
-40°C
