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Rothoblaas
Traspir EVO UV 115 · UV-resistant monolithic breathable membrane
Product code: TUV115
£194.00
ex VAT
· 1 per box
£232.80 inc VAT
£194.00 per unit
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Open-joint cladding and rainscreens leave the membrane on show. Daylight, wind-driven rain and heat all reach it through the gaps, so the membrane must be rated for the actual open-joint exposure. TRASPIR EVO UV 115 is built for that build-up: a highly UV-stable non-woven polypropylene top layer over a monolithic PU coated breathable film.
It is intended to provide a water-resisting, windtight and vapour-open layer in the specified façade build-up, including suitable metal-cladding applications. Performance depends on the membrane, sealed junctions and installation. Its permanent UV rating applies only within the stated joint-width and uncovered-area conditions; check the construction exposure limit separately.
Key features
- Permanent UV stability behind open joints up to 30 mm wide, with no more than 20% of the surface left uncovered.
- Monolithic PU coated film: watertight and windtight, and still breathable.
- Suitable for metal facades with high temperature fluctuations, with a service range of -40 to 120 degrees C.
- Reaction to fire Euroclass B-s1,d0 to EN 13501-1.
- Light to handle at 115 g/m2 and 0.3 mm thick.
- Conforms to EN 13859-2, the harmonised standard for flexible wall underlays.
- One code, TUV115. Roll 1.5 m x 50 m, 75 m2 per roll.
Before you fix
- The permanent UV rating applies inside the tested condition only: joints no wider than 30 mm, and no more than 20% of the surface uncovered. Anything wider or more open than that has not been tested.
- This is not a final waterproof layer for a roof.
- The membrane passes 5000 hours of UV ageing, which the datasheet puts at more than 12 months. As a precaution the manufacturer still limits exposure to weathering during the construction phase to a maximum of 10 weeks, so plan for the cladding to follow rather than leaving the wall open through a season.
Sold per roll.
Composition
Top layer: highly UV-stable non-woven PP fabric. Bottom layer: monolithic PU coated breathable film.
Mass per unit area [g/m2]
115 (EN 1849-2)
Thickness [mm]
0.3 (EN 1849-2)
Water vapour transmission Sd [m]
0.08 (EN 1931)
Water vapour resistance factor μ
approx. 270 (no standard stated on the sheet). The sheet prints approx. 0.4 MNs/g alongside it, which is the equivalent water vapour resistance, not a US unit.
Tensile strength MD/CD [N/50 mm]
150/110 (EN 12311-1)
Elongation MD/CD [%]
90/90 (EN 12311-1)
Resistance to nail tearing MD/CD [N]
130/170 (EN 12310-1)
Watertightness [class]
W1 (EN 1928)
Watertightness after artificial ageing [class]
W1 at 120 °C (EN 1297 / EN 1928). Ageing to EN 13859-2 Annex C, extended to 5000 h against the 336 h of the standard.
Tensile strength after artificial ageing MD/CD [N/50 mm]
> 98/72 (EN 1297 / EN 12311-1). Ageing to EN 13859-2 Annex C, extended to 5000 h against the 336 h of the standard.
Elongation after artificial ageing MD/CD [%]
> 59/59 (EN 1297 / EN 12311-1). Ageing to EN 13859-2 Annex C, extended to 5000 h against the 336 h of the standard.
Reaction to fire [class]
B-s1,d0 (EN 13501-1)
Resistance to penetration of air [m3/(m2h)]
< 0.02 at 50 Pa (EN 12114)
Flexibility at low temperatures [°C]
-40 (EN 1109)
Resistance to temperature [°C]
-40 to +120 (no standard stated on the sheet)
UV resistance without final coating
5000 h, more than 12 months (EN 13859-1/2). This is the fully uncovered case, with no cladding over the membrane. The sheet limits exposure to weathering during construction to a maximum of 10 weeks as a precautionary measure; under DTU 31.2 P1-2 (France) 5000 h of UV ageing equates to a maximum exposure of 6 months during the construction phase.
UV stability in an open-joint facade
Permanent, with joints up to 30 mm wide and no more than 20% of the surface exposed (EN 13859-2). Not intended as a final waterproof layer for roofs.
Water column [cm]
> 500 (ISO 811)
Open-joint claddingVentilated facadesRainscreen wall build-upsMetal facadesTimber frame wallsWeather protection during construction
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| Size / product code | Sold as | Price ex VAT | Availability | Quantity |
|---|---|---|---|---|
| 1.5 × 50 m · 75 m²TUV115 | Each | £194.00each | Supplied to order | Items |
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