FassaTherm - high-performance external wall insulation designed for modern construction

Sustainability Wed, Jan 7, 2026 1:56 PM

As energy efficiency, durability and sustainability continue to shape modern construction, FassaTherm stands out as a complete external wall insulation (EWI) solution engineered to meet both regulatory demands and long-term performance expectations.

Developed as part of Fassa Bortolo’s fully tested façade systems, FassaTherm combines high-quality insulation materials, advanced render finishes, and reinforced basecoat layers into a cohesive, reliable system.

At the heart of FassaTherm is a carefully specified range of insulation boards, including EPS, mineral wool and phenolic options, allowing designers and specifiers to select the most appropriate solution for thermal performance, fire resistance and building height. These insulation boards are securely bonded and mechanically fixed, forming the foundation of a system designed to significantly improve U-values, reduce heat loss, and enhance overall building comfort.

FassaTherm cycles are developed as complete systems rather than individual components. Each cycle incorporates a compatible basecoat adhesive, reinforced with high-strength glass fibre mesh to control movement and resist impact damage. This reinforcement layer plays a critical role in maintaining façade integrity over time, particularly in the UK’s challenging climate. A wide choice of mineral, silicone and acrylic finishes completes the system, offering excellent water repellence, vapour permeability, and long-lasting colour stability.

Sustainability is integral to the FassaTherm philosophy. By improving thermal efficiency, FassaTherm helps reduce operational energy consumption and associated carbon emissions throughout a building’s lifespan. Many system components are mineral-based and formulated to support vapour-open construction, contributing to healthier internal environments and reduced risk of condensation. Long service life and low maintenance requirements further enhance the system’s environmental credentials by minimising repair cycles and material waste.

For installers and contractors, FassaTherm offers confidence through fully tested and certified system cycles. Compatibility between layers is assured, simplifying specification and reducing on-site risk. Clear technical support, detailing guidance, and training further support correct installation and consistent results.

End users benefit from more than just improved energy performance. Buildings finished with FassaTherm gain enhanced acoustic comfort, increased weather protection, and an uplift in aesthetic appeal. The wide range of textures and colours allows façades to be tailored to both contemporary and traditional designs, adding long-term value to residential and commercial properties alike.

In an era where performance, sustainability and compliance are non-negotiable, FassaTherm delivers a proven EWI solution that balances technical excellence with architectural freedom - providing warmer, more efficient, and more durable buildings for the future.

To find out more on our FassaTherm products and cycles, please call 01684 218305 or email info.fassauk@fassabortolo.com

In association with Fassa Bortolo


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Company Details

Fassa House Ashchurch Business Centre
Alexandra Way
Tewkesbury
GL20 8TD
United Kingdom
T: 01684 218305
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