Screen – advanced roofing membrane for extreme conditions
Screens are an improved version of traditional roofing underlays. They perform the same function but are significantly more durable and long-lasting. They are suitable for use in the most demanding conditions and areas of the roof.
Screens from Marma Polskie Folie combine high durability with exceptional vapor permeability – which is only possible thanks to state-of-the-art technology.
Technical specifications
- Commercial form: roll 80 m²
- Color: black
- Grammage: 215 g/m²
- Material: polypropylene
- Roll width: 1.6 m
Advantages of the screen
- High and consistent vapor permeability
- Great flexibility and mechanical strength
- Very high UV resistance
- Ideal combination of durability and vapor permeability
- Water resistance ensuring roof sealing
- High surface weight and thickness guarantee long service life
- Can be used with or without boarding
- Comprehensive instructions for proper application
| PARAMETER | VALUE |
| Material | polypropylene – 3 layers |
| Weight [g/m²] | 215 +/- 20 |
| Sd – diffusion-equivalent air layer [m] |
0.015 (+0.06 / - 0.01) |
| Tensile strength [N/5cm] | longitudinal 400 (+/-100) transverse 280 (+/-100) |
| Elongation at break [%] |
longitudinal 90 (+/-50) |
| Nail tear resistance [N] |
longitudinal 260 (+/-90) |
| Waterproof class | W1 |
| Fire resistance class | E-d2 |
| Roll dimensions [m] | width 1.6 m length 50 m |
| UV resistance* | 26 weeks |
| Period without main roofing** | 4 weeks |
* According to laboratory tests conducted under artificial aging, this period was determined based on the average annual UV exposure from the sun in Central Europe.
** The recommended period during which the membrane remains on the roof without the main covering should be as short as possible and depends on the membrane's construction.
