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OMEGA MONOTOP 330 Roof Underlay

OMEGA MONOTOP 330 Roof Underlay
Vapour permeable roof underlay for roofs where there is an increased need for raintightness in accordance with ÖNORM B 4119. Use for roof pitches starting from 5°.
  • outdoor exposure up to 6 months
  • anti-slip and stable with two integrated adhesive stripes
  • easier to process
  • no wave formation

Available dimensions

Article number Type Roll width Roll length Rolls / Pallet Total area Inquiry List
2OM330P SK DUO 1.5 m 25 m 24 rolls 900 m²

Product data

Field of application

  • for vented pitched roofs
  • for roofs with increased need for rain-tightness
  • for installation directly on thermal insulation / wood sheathing


  • rain-tight
  • wind-tight
  • six months uv-resistance
  • anti-glare
  • water-tight
  • easily cut
is a vapour permeable roof underlay for installation directly on the thermal insulation or the wood sheathing. The underlay can be welded on the joints. The roof underlay is suitable for roofs with increased need for rain-tightness (because of small roof pitch for example). According to German classification it is UDB-A and USB-A. The membrane guarantees extreme resistance against wind-driven rain while humidity in form of vapour still can pass the construction.
Material composition
Monolithic membrane with PES fleece on both sides and two two-way acrylate adhesive strips
0.15 (+0,05 / -0,08) m
1 mm
Temperature resistance
-40–100 °C
330 g/m²
Dark grey

Processing guideline