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Isocell Omega Light Roof/Wall Underlay

Siegware
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The OMEGA LIGHT from ISOCELL, is an extremely diffusive vapour permeable roof/wall underlay for installation directly onto the face of the thermal insulation or wood sheathing and is suitable for ventilated facades (walls) and ventilated pitched roofs. Here is a brief overview on how the OMEGA LIGHT can easily surpass the AS/NZS 4200.1 standards, and what allows for its superior performance compared to similar wraps on the market.

Details
Features

Advanced Membrane Technology:

A high-performance membrane provides exceptional water resistance, exceeding the requirements of AS/NZS 1530.2. This creates a dependable barrier against rain infiltration, safeguarding your building’s interior from water damage.

UV Fortification:

Treated with UV stabilizers, OMEGA LIGHT resists degradation from sunlight, ensuring long-lasting performance over the lifespan of your roof. This helps in preventing possible UV damage, when the wraps go on and while exposed to sunlight before the cladding is put on.

100% Recyclable:

Environmentally conscious construction can be achieved with OMEGA LIGHT’s sustainable design.

Ideal Working Condition:

The lightweight and flexible material allows for efficient on-site handling and installation. additionally, the surface properties of OMEGA LIGHT promote safe working conditions during installation.

Superior Breathability:

A key feature of OMEGA LIGHT is its breathable membrane. This allows trapped moisture vapor to escape from the roof cavity, preventing condensation buildup and potential mould growth.

Energy Efficiency

Siegware’s commitment to low-energy construction extends far beyond Isocell OMEGA LIGHT membranes. We have Certified Passive House Experts on our team, possessing a comprehensive understanding of airtightness principles and all aspects of low-energy building practices. This expertise translates into close, personalized technical support for our clients throughout their projects.

At Siegware, we proudly push to expand the scale and scope of the technical awareness and expertise on energy efficient building in Australia and New Zealand. Part of these activities, is the ‘Passive House Training Day’ which we hold on site, twice the year.

About the Brand

Based in Austria, Isocell is a prestigious, well known and trusted brand across Europe, they specialise in building airtightness systems, from high performing certified building wraps and membranes, to specialty tools, sealants, adhesives and more.

Now available in Australian market. Siegware is the official and exclusive partner of Isocell in Australia.

www.isocell.com 

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About the
Seller

Founded in 2009, we began by supplying Siegenia hardware to Australia’s emerging energy-efficient window market. Over time, our business has evolved to offer a carefully selected range of premium European-engineered hardware and construction consumables for architectural and low-energy building applications.

Today, we work closely with architects, designers, window and door fabricators, and builders across Australia and New Zealand, supporting projects that demand precision, durability, and performance—without compromising timelines. By maintaining significant stock levels in our local warehouse, we help ensure reliable availability and fast turnaround when it matters most.

Our reputation is built on the quality of our products and the strength of our service. With deep industry experience, we provide practical technical support, dependable supply, and solutions informed by European innovation—delivering real, long-term value for our customers.

Verified ArchiPro Member1 year · Since 2025