L2/ N15/ N35
Roofing Membrane
A Breathable Roof Membrane
Membranes
with High Vapour Permability
In order to supply interior with natural light where there are no opportunities to install roof or vertical windows, an effective solution can be a Light Tunnel. Thanks to the light tunnel the natural light gets into the building illuminating its interior. In the other rooms light tunnel can be an additional source of light. The amount of light which enters the room through the light tunnel, the more light is conveyed to the building interior. The below diagram illustrates the full amount of the daylight (lm) depending on the month and cloudiness measured at the light tunnel dome.
| Technical Parameters |
L2 |
N15 | N35 |
| Basic Weight (g/m) | 90 | 115 | 135 |
| Number of Layers | 3 | 3 | 3 |
| Vapour Permeability (g/m/24h) | 3100 g/m²/24h
38ºc/85%RH Lyssy |
2800 g/m²/24h
38ºc/85%RH Lyssy |
2900 g/m²/24h
38ºc/85%RH Lyssy |
| Vapour Permeability Coefficient Sd (m) | 0.008 | 0.004 | 0.007 |
| Water Penetration Resistance Class before/after Artificial Ageing | CLASS W1 | ||
| Resistance to Tearing:
Lengthwise (N/5cm), Crosswise (N/5cm) |
L: 190, C: 110 | L: 230, C: 135 | L: 250, C: 170 |
| Application Temperature Range (ºC) | from -40 to +120 | ||
| UV Radiation Resistance (month) | 3 | 3 | 3 |
| Material | Polypropylene | ||
| Flammability Class | CLASS E | ||
| Packing (Roll/Pallet) | 36 | 36 | 36 |
| Roll Dimension (m) | 1.5 x 50 | ||
| Possibility of use on Full Boarding | No | No | No |