Products for building
Patent No. 243103 granted on 2023.04.12 (in force from 2019.07.01)
The MPFORT 2F SCREEN represents a world revolution in the market of high-vapour permeable roofing underlayments. It is manufactured by Marma Polskie Folie using a patented technology that introduces new standards in this group of roofing materials.
The innovative technology not only ensures higher membrane quality, but also significantly enhances its functionality and durability. The MPFORT 2F SCREEN offers the highest strength while maintaining very high vapour permeability, guaranteeing exceptional energy savings for heating.
Inside every traditionally produced roofing underlay is a film layer that blocks external water while allowing water vapour from inside the building to escape. The MPFORT 2F SCREEN features two such films, bonded by a special non-woven fabric with vertical fibres that create an additional separating layer. This space helps to dampen bothersome, high-pitched noises.
| PARAMETER | VALUE |
| Material | polypropylene - 5 layers |
| Mass [g/m²] | 300 ±35 |
| Sd – equivalent air layer thickness [m] | 0.015 (+0.06/-0.01) |
| Tensile strength [N/50mm] | lengthwise: 550 (±200) crosswise: 450 (±200) |
| Elongation at break [%] | lengthwise: 80 (±40) crosswise: 100 (±40) |
| Nail tear resistance [N] | lengthwise: 450 (±200) crosswise: 550 (±200) |
| Water tightness | W1 |
| Standard roll dimensions [m] | width 1.6 m × length 25 m |
| Fire resistance class | E |
| UV resistance* | 26 weeks |
| Period without main covering** | 6 weeks |
* According to laboratory studies conducted under artificial aging, this period is based on average annual UV exposure from sunlight in Central Europe.
** The period for which the membrane remains on the roof without the primary covering should be as short as possible; the more sunny days there are, the shorter this period should be.
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