Metra zero
brevetto patent
Breathable and waterproofing underlay
VAPOUR CHECK
ULTRASONIC WELDING
WATERPROOFING
RECYCLABLE
ROOF
WIND BARRIER
Vapour check underlay completely composed of 3 polypropylene layers welded by ultrasonic technology, which makes the material totally recyclable. It prevents infiltration of moist air, regulating the flow in the underneath roof. Stabilized against UV rays, with anti-skid properties.
As layer of protection on the first deck under the thermal insulation, Elements suggests E-SF-140, and at the same time protects the board from mechanical stress created by the operator during the laying of the roof.
| CHECKED CHARACTERISTICS | NORM | UNIT OF MEASURE | VALUE |
|---|---|---|---|
| Mass per unit area | EN 13859-1 | g/m2 | 140±5% |
| Thickness | EN 1849-2 | mm | 0,65±15% |
| Tensile Strength |
EN 13859-1 |
N/5cm | MD: 340±15% CD: 230±15% |
| Elongation | EN 13859-1 | % | MD: 75-95% CD: 85-105% |
| Nail Tearing |
EN 13859-1 |
N | MD: 160±15% CD: 200±15% |
| Resistance to water penetration | EN 13859-1 | Class W1 | |
| Water impermeability | EN 20811 | m | 5 (average value) Minimum: 3 |
|
Durability: |
EN 13984 | NPD pass |
|
| Artificial ageing Tensile strength after ageing Resistance to water penetration after ageing |
EN 13859-1 | N/5cm | MD: 306±15% CD: 207±15% Class W1 |
| UV Resistance | Internal method | 6 months | |
| Water vapour transmission property |
EN 13859-1 |
g/m² x 24h m |
WDD: 7,7±15% Sd= 5,5 23°C 0/75% RH |
| g/m² x 24h m |
WDD: 8±15% Sd=3 38°C 93/50% RH |
||
| Dimensional stability | EN 13859-1 (80°C) |
% | MD : -1<ΔL<0 CD : 0<ΔL<0,5 |
| Flexibility at low temperature | EN 13859-1 | °C | -40 |
| Fire reaction | DIN 4102 EN 13859-1* *Product not supported by wooden board |
B2 E |
|
| Air permeability | EN 13859-2 | mᶟ/h m² | <0,3 |
For information regarding use, handling. storage and security see DOP
Product subject to CE mark according to EN 13859-1/EN 13859-2 and EN 13984
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