DASATOP
Refurbishment vapour check for 'sub-and-top' installation from the outside
Advantages
- Best possible reliability thanks to ‘sub-and-top’ installation
- Protects building components: humidity-variable sd value allows for installation into the spaces between rafters and over the tops of the rafters
- Time-saving installation: no adhesion to rafters required
- No insulation cover necessary
- Easy to work with: particularly robust thanks to fleece reinforcement
- Excellent values in hazardous substance testing, has been tested according to the ISO 16000 evaluation scheme
Areas of application
Suitable as a ‘sub-and-top’ vapour check (alternate terms: vapour control or retarder) membrane and airtight membrane for all structures with diffusion-open roofing underlay membranes (e.g. pro clima SOLITEX). If the roofing underlay membrane is installed onto sheathing, the maximum permitted sd value of the underlay is 0.2 m (maximum g value: 1 MN·s/g ; minimum perm rating: 16.4 US perms). Also suitable in combination with wood-fibre underlay panels and MDF panels, and with fleece-laminated foam insulation materials (PUR, PIR, EPS etc.) with a thickness of 50 mm (2") and greater.
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 ; 0.33 oz/ft² | EN 1849-2 |
| Thickness | EN 1849-2 | 0,25 mm ; 10 mils | 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 |
| g value | 8 MN·s/g | ||
| g value, humidity-variable | 0.25 - 10 MN·s/g | ||
| Vapour permeance | ASTM E 96 | 2 perms | ASTM E 96 |
| Vapour permeance, humidity-variable | EN ISO 12572 | 1.6 - 66 US perms | EN ISO 12572 |
| Fire class | EN 13501-1 | E | EN 13501-1 |
| Outdoor exposure | 4 weeks | ||
| Watertightness to liquid water | EN 1928 | W1 | EN 1928 |
| Water column | EN ISO 811 | > 1 500 mm ; > 4' 11" | EN ISO 811 |
| Airtightness | EN 12114 | Tested | EN 12114 |
| Tensile strength MD/CD | EN 12311-2 | 195 N/5 cm / 105 N/5 cm ; 22 lb/in / 12 lb/in | EN 12311-2 |
| Elongation MD/CD | EN 12311-2 | 90% / 90% | EN 12311-2 |
| Nail tear resistance MD/CD | EN 12310-1 | 110 N / 105 N ; 25 lbf / 24 lbf | EN 12310-1 |
| Durability after artificial ageing | EN 1296 / EN 1931 | Passed | EN 1296 / EN 1931 |
| Temperature resistance | Permanent -40 °C to 80 °C ; -40 °F to 176 °F | ||
| Thermal conductivity | 0,04 W/(m·K) ; 0,3 BTU·in/(h·ft²·°F) | ||
| CE labelling | EN 13984 | Yes | EN 13984 |
