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EUROTOP N35 is an excellent material for use as a fully supported or unsupported roof underlay on tiled or slated pitched roofs constructed in accordance with the relevant clauses of BS 5534: 2003.
EUROTOP N35 may be used in cold and warm roof situations. Providing the roof has been counter battenned with a minimum 25mm timber on top of the membrane and fitted to the manufacturer's installation specification the roof will require no further forms of ventilation. It has a high tear resistance and a unique combination of parameters like waterproofing and water vapour diffusion that enables the fabric to vent moisture whilst remaining fully waterproof, and also guarantees that insulation will remain dry.
Its high waterproofing properties also protect the roof against penetration of water from consequently may be used as temporary waterproofing prior to installation of tiles or slates. Excellent water vapour transmission performance ensures that warm moist air which rises up from the building and into the roof construction can pass freely through the breatheable underlay. Tests indicate that Fakro breather membranes will resist the passage of water and wind-blown snow and dust into the interior of the building.
EUROTOP N35 can be laid directly on to insulation and allows it to be used at full rafter height. As a wind protective material it does not allow heat to be drawn away from the insulation.
EUROTOP N35 consists of three layers. It is a modern product manufactured by a lamination with an electrostatic field of a water vapour permeable and waterproof film between two layers of non-woven poly propylene spun bond to form a flexible sheet. An outer spun bond layer in green is tear resistant. The middle layer makes the underlay waterproof and breatheable and the third, white layer, protects the middle layer against mechanical damage and also assists in tear resistance.
EUROTOP N35 technology and the materials provide long term resistance to UV and heat radiation. It is 100% recyclable and capable of re-use as a raw material.
EUROTOP N35 can also be applied on boarded roofs.
Technical Information:
| Water Vapour permeability | ca. 1500 g/m2/24h (BS 3177 at 25°C/75% RH) ca. 3200 g/m2/24h (ASTM E398-83 at 38°C/85% RH) |
| Head of Water (BS EN 20811) | ca. 5500mm H2O |
| Tensile Strength (EN 12311-1) | MD 270 N/5cm CD 170 N/5cm |
| Vapour resistance (BS 3177) | 0.14 MNsg 1 |
| Resistance to Tear (nail shank) (BS EN 12310-1) | MD 120 N/5cm CD 120 N/5cm |
| UV Exposure Tolerance | 3 Months |
| Heat resistance | -40°C to + 120°C |
| Colour Top/Bottom | Green top surface / White under surface |
| SD-value (COBR PIB nr 64) | 0.015m |
| Roll Width (BS 1848-2) | 1.5m |
| Roll Length (BS 1848-2) | 50m |
| Roll Weight | ca. 10.5kg |
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