Across Europe and other global construction markets, fibre cement manufacturers are increasingly adopting CEM II technology as part of a broader evolution in building materials.
CEM II is a type of cement that uses less clinker than traditional CEM I cement. Because clinker production accounts for most of the carbon emissions associated with cement manufacturing, reducing clinker content can help lower embodied carbon within the cement component of a product.
As part of this industry-wide shift, the Genesis Raw, Hewn and Groove ranges are now being manufactured using CEM II technology.
CEM II is a classification of cement recognised under European standards. Compared to traditional CEM I cement, it contains a lower proportion of clinker and includes supplementary cementitious materials (SCMs) such as limestone and fly ash.
These SCMs allow manufacturers to reduce clinker content while maintaining the performance characteristics required for modern construction applications. For fibre cement cladding, CEM II is increasingly being adopted across international markets as manufacturers continue to refine both product performance and material efficiency.
The internal structure of a fibre cement board plays an important role in how it performs throughout its service life. CEM II contributes to a denser fibre cement matrix, which supports dimensional stability.
This matters for facade materials, which are regularly exposed to changing temperatures, varying humidity levels and seasonal weather conditions. A stable board helps the facade continue to perform as designed, while maintaining the clean, consistent appearance expected of modern cladding systems.
For builders and installers, dimensional stability is a key consideration when selecting materials for long-term performance.
Genesis NXG Raw, Hewn and Groove are through-coloured fibre cement panels, meaning pigment is distributed throughout the board rather than sitting only on the surface. Colour fade in fibre cement materials is typically caused by UV bleaching, where prolonged sun exposure gradually breaks down the pigment at a molecular level. The refined, dense structure associated with CEM II helps limit UV penetration and moisture ingress into the board, both of which can accelerate this breakdown. For architects and designers, this means greater confidence that the facade will still look as specified years after installation.
Moisture management is a key factor in the durability of any exterior cladding product. Research into CEM II cement technologies has shown that they can help reduce the movement of moisture through cement-based materials. This can contribute to lower water absorption and improved weathering performance over time.
For fibre cement cladding, effective moisture management supports the long-term durability of the building envelope when exposed to rain, humidity and coastal conditions.
As Australia's climate varies from region to region, weather resistance remains an important consideration for architects, builders and property owners alike.
One of the key reasons for the growing adoption of CEM II is its reduced clinker content. Industry organisations including the Global Cement and Concrete Association (GCCA) identify clinker reduction as one of the most effective ways to lower carbon emissions associated with cement production.
Because CEM II uses less clinker than traditional CEM I cement, it is generally associated with lower embodied carbon within the cement component of a product.
While embodied carbon is only one measure of environmental impact, the increased use of CEM II reflects broader efforts across the construction industry to improve material efficiency and reduce emissions where possible.
The adoption of CEM II within the Genesis Raw, Hewn and Groove ranges reflects a broader evolution occurring across the fibre cement industry.
As manufacturers continue to refine building materials, CEM II is becoming an increasingly common choice for fibre cement cladding thanks to its combination of durability, weathering performance and reduced clinker content.
For architects, designers and builders, understanding CEM II provides valuable insight into the materials shaping the future of exterior facades.
Curious to learn more? Download the Genesis NXG Whitepaper for a deeper exploration of CEM II technology and its role in modern fibre cement cladding.
