Metra zero
brevetto patent
Breathable and waterproofing underlay
VAPOUR BARRIER
POLYESTER CARRIER
ANTISKID
WATERPROOFING
LIGHT
ROOF
Waterproofing and vapour barrier underlay composed of a polyester carrier saturated with an exclusive bituminous compound and protected by non-woven polypropylene. Ultra-light and highly performing thanks to an innovative technology that uses polymeric microcomposites. Stabilized against UV rays.
Underlay for discontinuous roofing. It find its ideal application if placed under the insulation as a vapour barrier. Thanks to its high impermeability it is recommended to use it in case of prolonged exposure to weather agents. It is indicated as waterproofing substrate for the direct fixing of Canadian shingles.
| CHECKED CHARACTERISTICS | NORM | UNIT OF MEASURE | VALUE |
|---|---|---|---|
| Mass per unit area | EN 13859-1 | g/m2 | 290±5% |
| Thickness | EN 1849-1 | mm | 0,5±15% |
| Tensile strength |
EN 13859-1 |
N/5cm | MD: 360±15% CD: 290±15% |
| Elongation | EN 13859-1 | % | MD: 20-40% CD: 30-50% |
| Nail tearing |
EN 13859-1 |
N | MD: 150±15% CD: 150±15% |
| Resistance to water penetration | EN 13859-1 | Class W1 | |
| Water impermeability | EN 20811 | m | 4 (average value) minimum: 2 |
| Artificial ageing Tensile strength after ageing Resistance to water penetration after ageing |
EN 13859-1 | N/5cm | MD: 360±15% CD: 232±15% Class W1 |
| UV resistance | Internal method | 4 months | |
| Water vapour transmission property |
EN 13859-1 |
g/m² x 24h m |
WDD: 1,1±20% Sd= 40 23°C 0/75% RH |
| Dimensional stability | EN 13859-1 (80°C) |
% | -0,5<ΔL<0,5 |
| Flexibility at low termperature | EN 13859-1 | °C | -40 |
For information regarding use, handling, storage and security see DOP
Product subject to CE mark according to EN 13859-1
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