DASATOP®
Retrofit Vapour Control Layer
Advantages
- Airtightness installed from the outside
- Specifically developed for roof restoration
- Humidity-variable MVTR
- No additional airtight joints required at the rafters
- High tear resistance due to fleece reinforcement
Areas of application
DASATOP® is an air-resistive barrier for installation over rafters and across sarking in roof renovation projects. Installed from the outside, DASATOP® protects structures from rain wetting during construction while cladding is removed.
Technical specs
| Material | |||
| Protective and covering fleece | Polypropylene | ||
| Functional film | Polyethylene copolymer | ||
| Property | Regulation | Value | Regulation |
| Colour | Green | ||
| Surface weight | EN 1849-2 | 100 g/m² | EN 1849-2 |
| Thickness | EN 1849-2 | 0,25 mm | EN 1849-2 |
| Water vapour resistance factor µ | EN 1931 | 6 400 | EN 1931 |
| sd-value | EN 1931 | 1.60 m | EN 1931 |
| sd value, humidity-variable | EN ISO 12572 | 0.05 ‑ 2 m | EN ISO 12572 |
| UV stability and outdoor exposure | 4 weeks | ||
| Watertightness to liquid water | EN 1928 | W1 | EN 1928 |
| Water column | EN ISO 811 | > 1 500 mm | EN ISO 811 |
| Airtightness | EN 12114 | Tested | EN 12114 |
| Tensile strength MD/LD | EN 12311-2 | 195 N/5 cm / 105 N/5 cm | EN 12311-2 |
| Elongation MD/LD | EN 12311-2 | 90% / 90% | EN 12311-2 |
| Nail tear resistance MD/LD | EN 12310-1 | 110 N / 105 N | EN 12310-1 |
| Durability after artificial ageing | EN 1296 / EN 1931 | Passed | EN 1296 / EN 1931 |
| Temperature resistance | EN 1109, EN 1296, EN 1297 | Permanent ‑40 °C to 80 °C | EN 1109, EN 1296, EN 1297 |
