Metra zero
brevetto patent
Breathable and waterproofing underlay
BREATHABLE
ULTRASONIC WELDING
RECYCLABLE
WATERPROOFING
WIND BARRIER
ROOF
Highly breathable underlay composed by 3 layers in polypropylene welded with ultrasonic technology. The absence of glues and harmful substances makes the product totally recyclable with high breathable properties. Stabilized against UV rays. It has anti-skid properties.
The HYGRO WRAIS waterproofing and breathable membrane is characterized by the high moisture dispersion power. The moisture, in fact, is uniformly distributed over the entire membrane area outwardly in the shortest possible time. The breathability is optimized because the membrane works at every point according to the maximum concentration gradient of water vapour.
| CHECKED CHARACTERISTICS* | NORM | UNIT OF MEASURE | VALUE |
|---|---|---|---|
| Mass per unit area | EN 13859-1 | g/m2 | 240±5% |
| Thickness | EN 1849-2 | mm | 1,45±15% |
| Tensile Strength |
EN 13859-1 |
N/5cm | MD: 730±15% CD: 540±15% |
| Elongation | EN 13859-1 | % | MD: 55-75% CD: 65-85% |
| Nail tearing |
EN 13859-1 |
N | MD: 320±15% CD: 380±15% |
| Resistance to water penetration | EN 13859-1 | Class W1 | |
| Water impermeability | EN 20811 | m | 4 (average value) Minimum: 2 |
| Artificial ageing Tensile strenght after ageing Resistance to water penetration after ageing |
EN 13859-1 | N/5cm | MD: 620±15% CD: 459±15% Class W1 |
| UV resistance | Internal method | 4 months | |
| Water vapour transmission property | EN 13859-1 | g/m² x 24h m |
WDD: 790±15% Sd= 0,026 23°C 93/50% RH |
| g/m² x 24h | WDD: 1935±15% 38°C 93/50% RH |
||
| Dimensional stability | EN 13859-1 (80°C) |
% | MD : -3,4<ΔL<0 CD : -1<ΔL<0 |
| Flexibility at low temperature | EN 13859-1 | °C | -40 |
| Fire reaction | EN 13859-1* *Product support by wooden board |
E | |
| Air permeability | EN 13859-2 | m3/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
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