Metra zero
brevetto patent
Breathable and waterproofing underlay
VAPOUR BARRIER
POLYESTER CARRIER
ANTISKID
WATERPROOFING
MECHANICAL RESISTANCE
ROOF
Waterproofing and vapour barrier underlay composed of a polyester carrier saturated with an exclusive bituminous compound and protected by non-woven polypropylene. Characterized by excellent waterproofing properties. Stabilized against UV rays.
Underlay for discontinuous roofing. It is recommended to use it on the second deck, more exposed to the elements and where the fixings often have larger sections, thus favoring the rapid and safe conveyance of rainwater and its rapid transfer to the eaves line. The high weight makes it an optimal product in regions characterized by a harsh climate or by high temperature ranges.
| CHECKED CHARACTERISTICS | NORM | UNIT OF MEASURE | VALUE |
|---|---|---|---|
| Mass per unit area | EN 13859-1 | g/m2 | 900-1000 |
| Thickness | EN 1849-1 | mm | 1±15% |
| Tensile strength |
EN 13859-1 |
N/5cm | MD: 470±15% CD: 360±15% |
| Elongation | EN 13859-1 | % | MD: 25-45% CD: 30-50% |
| Nail tearing |
EN 13859-1 |
N | MD: 195±15% CD: 220±15% |
| Resistance to water penetration | EN 13859-1 | Class W1 | |
| Water impermeability | EN 20811 | m | 6 (average value) minimum: 4 |
| Artificial ageing Tensile strength after ageing Resistance to water penetration after ageing |
EN 13859-1 | N/5cm | MD: 433±15% CD: 252±15% Class W1 |
| UV resistance | Internal method | 4 months | |
| Water vapour transmission property |
EN 13859-1 |
g/m² x 24h m |
WDD: 0,4±15% Sd= 106 23°C 0/75% RH |
| Dimensional stability | EN 13859-1 (80°C) |
% | -0,7<ΔL<0,7 |
| 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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