Breathable membrane WÜTOP® TRIO 330 2SK
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Breathable membrane WÜTOP® TRIO 330 2SK
High-performance roof underlay, specifically designed to withstand high mechanical loads and ensure reliability in extreme weather conditions
Exclusively for trade customers
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Variants
Exclusively for trade customers
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- Three-layer construction: two outer layers made of polypropylene (PP), one inner functional film made of monolithic thermoplastic polyurethane (TPU)
- Excellent breathability, promoting optimal water vapour management within the roof structure
- To be laid on the cold side of a roof, directly against the thermal insulation
- The TPU film ensures excellent resistance to temperature changes and chemicals (impregnating agents, chainsaw oils etc.)
- Flexibility at low temperatures: retains flexibility down to -40 °C, facilitating installation even in cold weather conditions
- High weight (330 g/m²) gives the underlay excellent tensile strength and tear resistance, making it extremely robust and durable
- Double-sided adhesive tape integrated in the overlap area enables quick installation and ensures a perfect seal against air and water
- Optimally protects the thermal insulation against rain, snow and wind, improving the energy efficiency of the building envelope
Notice
We recommend that all overlaps, structural details and joins of the breathable membrane be sealed with the utmost care to ensure an optimal seal over the entire surface
The breathable film is not a suitable surface for direct installation of slate tiles or slabs using polyurethane foam
WÜTOP® Trio 330 2SK is not intended as a final roof covering
Instructions
- WÜTOP® TRIO 330 2SK roof underlays can be laid directly on the thermal insulation or on the wooden decking of ventilated pitched roofs
- Start laying from the bottom and work upwards while keeping the underlay slightly taut. Lay in parallel to the line of the eaves
- Attach the underlay to the rafters (for discontinuous support) or to the decking (for continuous support) by applying staples 5 cm from the edge in the overlap area only (marked with a cut-off line)
- The next sheet of underlay should be laid so that it overlaps the previous sheet by at least 10 cm (see marking on the edge), or at least 20 cm in the case of low-pitched roofs. Where there is no integrated adhesive tape, glue and seal the overlap with Eurasol® Max adhesive tape (art. 0992710160) or with CONNECT ADHESIVE ALL-IN-ONE (art. 0893700111)
- Fix the underlay in place with counter battens mounted parallel to the rafters (from the ridge to the eaves). Apply Eurasol® nail sealing tape (art. 0875851145/0875851160) under each counter batten to prevent water ingress. The staples are only a temporary securing solution: Counter battens must always be used for permanent fastening. Caution: Users who fit the underlay without counter battens do so at their own risk
- Vertical overlaps must be positioned over a rafter or a solid surface and must be glued and sealed with Eurasol® Max adhesive tape. Joins with roof features: Where chimneys, skylights or other openings are present, cut and position the underlay in such a way as to prevent water ingress
- Wrap the underlay around the feature, tuck in the underlay at the sides, glue and seal with Eurasol® Max adhesive tape (art. 0992710160)
- Cuts or cracks must be repaired using pieces of the same underlay, glued and sealed with Eurasol® Max adhesive tape (art. 0992710160). For minor damage, adhesive tape alone is sufficient
- When laying the underlay, carefully check that it is in perfect condition and that there is no damage of any kind (cuts, abrasions etc.)
- The final roof covering (tiles) must be installed within a maximum of three months of the underlay being laid, to prevent damage from UV rays
- Ventilation: In ventilated roofs, always ensure that air flows correctly between the eaves and ridge
Select RAL-colour code
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