• Ondutiss Air 100 breathable roofing membrane roll – high-performance underlay
  • Ondutiss Air 100 breathable roofing membrane roll – high-performance underlay
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Ondutiss

Ondutiss

£16.93 GBP
£16.93 GBP
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Ondutiss is a durable and breathable roofing membrane developed to safeguard pitched roofs from wind-driven rain, snow, and dust while allowing internal moisture to escape. This lightweight, three-layer membrane acts as an effective secondary barrier beneath tiles or other roof coverings, helping to maintain a dry, energy-efficient roof structure. Easy to handle and quick to install, Ondutiss supports healthy ventilation by reducing condensation build-up within the roofing system. Suitable for use on both ventilated and non-ventilated cold or warm roof applications, it's an ideal choice for professional roofers seeking performance and reliability.

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Technical Specifications

ONDUTISS AIR 100
Reaction to fire (class): E
Watertightness (class): W1
Water vapour resistance factor Sd (m): 0,02 (-0,01 +0,03)
Tensile strength (longitudinal/transverse direction) (N/50 mm): 240 / 125 (±30%)
Elongation at maximum load (longitudinal/transverse direction) (%): 60 / 70 (±30%)
Resistance to tearing (longitudinal/transverse direction) (N): 100 / 120 (±20%)
Flexibility at low temperature (pliability) (°C): ≥-40
Durability of resistance to water penetration (class): W1
Durability of tensile strength (longitudinal/transverse direction) (N/50mm): ≥60% of initial value tested
Durability of elongation (longitudinal/transverse direction) (%): ≥50% of initial value tested
Dangerous substances: NPD
Harmonised Standard EN 13859-1:2010, EN 13859-2:2010
BBA Certified

ONDUTISS AIR 120
Reaction to fire (class): E
Watertightness (class): W1
Water vapour resistance factor Sd (m): 0,02 (-0,01 +0,03)
Tensile strength (longitudinal/transverse direction) (N/50 mm): 280 / 155 (±30%)
Elongation at maximum load (longitudinal/transverse direction) (%): 70 / 60 (±30%)
Resistance to tearing (longitudinal/transverse direction) (N): 100 / 120 (±20%)
Flexibility at low temperature (pliability) (°C): ≥-40
Durability of resistance to water penetration (class): W1
Durability of tensile strength (longitudinal/transverse direction) (N/50mm): ≥60% of initial value tested
Durability of elongation (longitudinal/transverse direction) (%): ≥50% of initial value tested
Dangerous substances: NPD*
Harmonised Standard EN 13859-1:2010, EN 13859-2:2010
BBA Certified

NPD* : No Performance Determined