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Designed for compliance. Built to perform.
Proven. Compliant. Consistent
By uniting our systems under one brand, Protex® streamlines decision-making, reduces ambiguity, and provides clear access to technical data. In addition, every system is supported by our in-house technical team – ensuring guidance is available from specification through to installation.
More importantly, each Protex® system is engineered to meet modern construction standards and deliver tangible value throughout the build lifecycle.
We’ve supplied Protex® systems to hundreds of UK buildings from logistics hubs and retail parks to training centres and commercial developments. Our manufacturing base in West Yorkshire ensures consistency and quality, while our in-house technical team supports you every step of the way.
As a result, architects, developers and main contractors across the country trust Protex® to deliver performance without compromise.
From first concept to final fix, Protex® provides confidence throughout your building envelope journey. Whether you’re focused on regulatory compliance, carbon reduction, or durability, our systems offer certified performance, adaptable configurations, and dependable delivery.
Ultimately, Protex® helps you build better from the outside in.
A building envelope refers to the physical barrier between a building’s interior and the outside environment. It typically includes the roof, walls, cladding, insulation, fixings and structural elements – all working together to regulate temperature, control air movement and ensure acoustic and fire performance.
In essence, the envelope protects the internal environment while contributing significantly to energy efficiency and occupant comfort. That’s why we created Protex® to simplify the design and specification of building envelope systems.
With tailored options for new builds, retrofits, and low-carbon construction, each Protex® solution is built around three key principles: performance, compliance and practicality.
A building envelope refers to the physical barrier between a building’s interior and the outside environment. It typically includes the roof, walls, cladding, insulation, fixings and structural elements – all working together to regulate temperature, control air movement and ensure acoustic and fire performance.
In essence, the envelope protects the internal environment while contributing significantly to energy efficiency and occupant comfort. That’s why we created Protex® to simplify the design and specification of building envelope systems.
With tailored options for new builds, retrofits, and low-carbon construction, each Protex® solution is built around three key principles: performance, compliance and practicality.
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Protex Classic® is part of a wider suite of integrated systems:
Each system shares a common commitment to performance and reliability. This ensures consistency across phases, projects, or frameworks.
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In today’s built environment, compliance, performance and environmental responsibility are expected – not optional. Protex® is Firth Steels’ response to that demand: a unified family of building envelope systems, engineered for roof and wall applications. It delivers consistent, dependable performance, while offering flexibility, clarity and peace of mind to specifiers, developers and contractors.
Rather than a single product, Protex® represents a strategic umbrella. It brings together multiple independently tested, built-up systems under one trusted brand. Whether you’re constructing new industrial units, retrofitting ageing assets or aiming to reduce embodied carbon, Protex® provides a clear route to regulatory confidence and long-term value.
We design Protex® systems to achieve certified non-fragility, both during installation and in their final installed state – providing safety and assurance for contractors, clients and facilities teams.
Thanks to excellent thermal performance and airtightness, our systems help reduce in-use emissions and long-term energy consumption.
We test every system to current fire safety standards, offering A1 non-combustible coatings to meet even the strictest compliance requirements.
Our systems come with up to 40-year coating warranties and 25-year system guarantees, giving you long-term protection and peace of mind.
Choose from a wide range of colours, profiles and finishes including matt, metallic and embossed options to meet functional and architectural needs.
You can configure Protex® to suit project-specific noise performance, using options like perforated liners and bespoke build-ups.
