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Diffusion foil under the cover
It is a diffusion foil under the covering for a simple ventilated roof. It is used as a waterproof protection layer, which protects thermal insulation against rain, snow, or dust from the outside. It can be mounted directly on the thermal insulation, without a ventilation layer. It is assembled freely overhang, directly on the rafters, or on the roof boarding. Material: three-layer diffusion foil.
Technical characteristics:
- specific weight: 120g/m²± 11%;
- tensile strength: 190N/5cm (±50%) / 100N/5cm (±30%);
- temperature range: -30 : 80 ⁰C;
- waterproofing degree: W1;
- Sd 0,02m (+0,03;-0,01)
| Product Name | BILKA 120g Foil | |
| Package size | Rolls 1,5 m x 50 m = 75 m²/roll | |
| Purpose and usage | Diffusion foil under the cover - used as additional protective layer against the dust and the moisture that penetrates under the cover, in the single layer ventilation roofs. | |
| Material: | Three-layer foil (between two layers of polypropylene, one membrane permeable to diffusion of vapors, but waterproof) | |
| Caracteristics | Test method | Declared value |
| Roll length | EN 1848-2 | 50m (-0/+2%) |
| Width | EN 1848-2 | 1,5m ± 0,5% |
| Mass per unit | EN 1849-2 | 120 g/m² ± 11% |
| Reaction to fire | EN 11925-2 | E Class |
| Watertightness (2kPa) | EN 1928 | W1 Class |
| Watertightness after artificial ageing | EN 1296; EN 1928 | W1 Class |
| Resistance to tearing (Longitudinal/Transverse) | EN 12310-1 | 110N (+50; -50) / 130N (+50; -50) |
| Tensile strength (Longitudinal/Transverse) | EN 12311-2 | 190 N/50mm (+50;-50) / 100 N/50mm (+30;-30) |
| Elongation (Longitudinal/Transverse) | EN 12311-2 | 80% (+40; -40) / 130% (+50; -50) |
| Tensile strength after artificial ageing (Longitudinal/Transverse) | EN 1296; EN 1297; EN 12311-2 | 140 N/50mm (+40;-40) / 70 N/50mm (+20; -20) |
| Elongation after artificial ageing (Longitudinal/Transverse) | EN 1296; EN 1297; EN 12311-2 | 60% (+30; -30) / 100% (+40; -40) |
| Vapour permeability | EN 1931 | >1700 (g/m²)/24h |
| Sd | EN 1931 | 0,02m (+0,03;-0,01) |
| Application temperature range | - | -30 : 80 ⁰C |
| Dangerous substances | - | NPD |
Assemblage rules:
The foil under the roof is installed in compliance with the standard DIN 4108 ensuring ventilation under the foil, fixed with battens and rafters, with upward inscription. Given that BILKA 120 foil is permeable to the vapors of the composition, it can be mounted directly on the thermal insulation, the ventilation channel between the foil and insulation will not occur. The foil is mounted parallel to the eaves, with an overlap marked on the roll edge with a colored stripe (min. 10 cm). It will be mounted given the direction of the water flow, it can cross over the ridge of the roof. It is a diffusion foil that resists normal thermal loads. The foil should be protected from direct exposure to UV radiation within one month of installation and from the effects of scattered radiation in max. three months, by the installation of insulation on the inside.
Storage and warehousing rules:
At shelter, dry place, away from moisture, sunlight and radiant heat.
Period of use:
In compliance with the storage rules, retain their qualities for 5 years from purchase.
Warranty:
In compliance with the regulations in force, under the observance of the transportation conditions indicated by the supplier.
Related prescriptions, specifications:
SR EN 13984
Possible risks, prevention prescriptions:
There is no risk of endangering health.