ISOCELL OMEGA MONO LIGHT SK DUO – monolithic roof underlay membrane

ISOCELL OMEGA MONO LIGHT SK DUO is a high-quality vapour-permeable monolithic roofing membrane designed for installation directly on insulation, timber battens or timber boarding. The membrane features two alternating acrylic adhesive strips, allowing overlaps to be joined quickly and securely.

The monolithic membrane provides excellent UV resistance and exceptionally high resistance to driving rain. Thanks to its non-porous functional layer, water vapour actively passes through the membrane from the inside to the outside while the membrane maintains its watertightness.

OMEGA MONO LIGHT SK DUO is suitable for ventilated pitched roofs, ventilated closed façades and as temporary weather protection during construction. According to the manufacturer, the product meets class 3 requirements for bonded roof underlays in accordance with ZVDH requirements.

Why choose OMEGA MONO LIGHT SK DUO?

• Monolithic membrane – water vapour passes through a non-porous functional layer rather than through a capillary structure.
• High UV resistance – suitable for applications where the structure is temporarily exposed to UV radiation during construction.
• Excellent resistance to driving rain – water resistance class W1.
• Two integrated acrylic adhesive strips – simplify and improve membrane-to-membrane bonding.
• Vapour permeable – Sd value of only 0.075 m.
• Windproof and rainproof.
• Slip-resistant surface – improves installation comfort.
• Anti-glare surface – more comfortable to work with in bright conditions.
• Easy to cut and handle.
• The monolithic membrane maintains its watertightness and UV resistance even when exposed to substances such as wood preservatives, chainsaw oil or resin.

Applications

ISOCELL OMEGA MONO LIGHT SK DUO is suitable for:

• ventilated pitched roofs;
• installation as a roof underlay above thermal insulation;
• installation on timber battens or timber boarding;
• ventilated closed façades;
• temporary weather protection during construction;
• timber-frame and prefabricated / modular building structures.

The membrane can be installed directly on insulation or timber boarding. It can be used as either an unsupported or supported roof underlay in accordance with the manufacturer's installation instructions.

Technical data

Weather resistance

OMEGA MONO LIGHT SK DUO is also designed to provide temporary weather protection during construction. According to the manufacturer, the permitted outdoor exposure periods are:

• up to 5 months on wall structures;
• up to 9 months when used as temporary construction-site protection, provided that no further use follows;
• up to 8 weeks on pitched roofs with a roof pitch of at least 14°.

The roof underlay does not replace the final roof covering, and the roof must be covered within the weather-exposure period specified by the manufacturer.