Article marked
Error occurred Please try again later

OMEGA UDOs 330 TopGrip Roof Underlay

OMEGA UDOs 330  TopGrip Roof Underlay
Vapour-permeable and weldable membrane for underroofs with increased rainproofing in accordance with ÖNORM B 4119. Carries the Swiss seal of approval for underroof membranes for building envelopes.
  • weather-proof for 12 months’ exposure
  • for roof pitch from 1.5° (seam-welding)
  • for roof pitch from 5° (SK DUO)
  • anti-slip fleece surface

Available dimensions

Article number Type Roll width Roll length Rolls / Pallet Total area Inquiry List
2TOP SK DUO 1.5 m 30 m 20 rolls 900 m²

Product data

Field of application

  • for vented pitched roofs
  • minimum roof pitch 1.5° (seam-welding)
  • minimum roof pitch 5° (SK DUO)
  • for installation directly on the thermal insulation / wood sheathing
Is a vapour-permeable, weldable roofing membrane for laying directly on thermal insulation or wooden sheathing. The membrane is suitable for underroofs with increased rainproofing in accordance with ÖNORM B 4119 and corresponds with the classification UDB-A in compliance with the ZVDH (national Association of Roofers) standard. Can be used for extreme demands in accordance with the underroof category pursuant to SIA 232/1. Moisture in the building’s interior can escape to the outside in the form of water vapour through the underroof membrane, at the same time providing tightness against wind-driven rain. Complies with the Swiss ‘Gebäudehülle Schweiz’ (building envelope) seal of approval for underroofs.
Material composition
PES fleece with TPU layer on both sides, including fleece coating on top
0.25 m
≥ 1 mm
Temperature resistance
-40–100 °C
420 (±30) g/m²
Light grey

Processing guideline