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OMEGA MONO 230 SK DUO Roof Underlay

OMEGA MONO 230 SK DUO Roof Underlay
A non-vapour retardant roof underlay for installation directly on the thermal insulation or the wood sheathing. In accordance with ÖNORM B 4119, the roof underlay is suitable for rainproof under-roofs as well as for under-roofs with increased rainproof properties with a roof pitch of > 15° and a snow load of up to 4.0 kN/m².
  • UV STABLE AND TIGHT AGAINST DRIVING RAIN

Available dimensions

Article number Type Roll width Roll length Rolls / Pallet Total area Inquiry List
2MONO230SKS SK DUO 1.5 m 50 m 20 rolls 1500 m²
2MONO230 SK DUO 3 m 50 m 20 rolls 3000 m²

Field of application

  • for vented pitched roofs
  • for installation directly on the thermal insulation or the wood sheathing

Advantages

  • raintight
  • windtight
  • 12 weeks UV-stability
  • non-glare
  • watertight
  • easy to cut

Product data

Is a non-vapour retardant roof underlay with two two-way acrylate adhesive strips for installation directly on the thermal insulation or the wood sheathing. In accordance with ÖNORM B 4119, the roof underlay is suitable for rainproof under-roofs as well as for under-roofs with increased rainproof properties with a roof pitch of > 15° and a snow load sk of up to 4.0 kN/m² and complies with the classification UDB-A and USB-A in accordance with the ZVDH Directive (ZVDH = German Central Association of the Roofing Trade).
Material composition
monolithic membrane with PP fleece on both sides and two-way acrylate adhesive strips
Thickness
0.75 mm
Colour
Lightgrey
Weight
230 g/m²
sd-value
0.08 m
Temperature resistance
-40 °C
Temperature resistance
80 °C
UV-resistance
12 weeks
Resistance to water flow
W1
Resistance to water flow
EN 1928
Elongation - lengthwise
80 %
Elongation - crosswise
83 %
Elongation
EN 12311-1
Tensile strength - lengthwise
320 N / 50 mm
Tensile strength - crosswise
270 N / 50 mm
Tensile strength
EN 12311 - 1
Tear propagation resistance - lengthwise
200 N
Tear propagation resistance - crosswise
220 N
Tear propagation resistance
EN 12310-1
Storage
cool and dry
Fire performance
E
Fire performance
EN 13501-1 / EN 11925-0

Processing guideline

(1) UNDERLAY (unsupported)

OMEGA roof Underlay is nailed parallel to the eaves with a slight drape and laid and mechanically fixed above the rafters. Vertical overlaps/joins must always lie on a rafter.
All overlaps must be bonded with OMEGA QUILLI Sealing Compound. Horizontal underlay panels can be joined using SK DUO adhesion as provided or with OMEGA QUILLI Sealing Compound. (no pressure need be applied).
(1) UNDERLAY (unsupported)

(2) UNDERLAY (supported)

OMEGA roof underlay is laid on sheathing parallel to the eaves. The blankets are fixed with concealed nails spaced at 10 cm at the ridge-side edges (marks at edge). All overlaps/joins must be bonded with OMEGA QUILLI Sealing Compound (without applying pressure) or the integrated adhesive strips (applying adequate pressure). For the raintight version (temporary cover) a nail-seal under the counter batten (OMEGA QUILLI Sealing Compound or OMEGA NDB Nail Sealing Tape ) is necessary. The single-sided nail-seal tape must be attached to the roof underlay directly beneath the counter batten!
(2) UNDERLAY (supported)

(3) EAVES CONSTRUCTION

We recommend an eaves construction with drainage below the gutter so that snowmelt build-up can easily drain off. We recommend the use of a metal sheet to drain off water.
(3) EAVES CONSTRUCTION

(4) RIDGE AREA

The ridge area is closed directly when covered with OMEGA roof underlay. This provides immediate protection against water penetration. In non-insulated lofts and/or ventilated interior insulation the ridge formation must be made open: the blankets end 3 cm before the ridge apex, counter battens are mounted and a
50 cm wide strip of OMEGA roof underlay must be attached over the roof apex.
(4) RIDGE AREA

(5) VALLEY INFORMATION

The first step in valley formation is to lay a continuous valley blanket.
(5) VALLEY INFORMATION

(6) PENETRATIONS

Sections cut out for roof penetrations (extractor pipes, roof windows, chimneys, etc.) should be kept as small as possible and the ends of the sheets must be fixed so that no rain or snow can penetrate. To achieve a perfect seal the suitable adhesive technology by ISOCELL GmbH & Co KG must be used.
Make sure that the substrate is clean! The manufacturer can accept no liability for mechanical damage. The applicable regulations and guidelines (e.g. of the ZVDH (Central Association of German Roofers) for Germany, Austrian Standard, ÖNORM B 4119, for Austria, ...) must be observed!
The roof underlay does not replace roof covering. The roof must be covered during the period of the specified weathering time. Early covering has a positive effect on the resistance to ageing.
(6) PENETRATIONS