In today’s construction landscape, safety, sustainability and compliance are no longer optional - they’re essential. That’s why at EWI Store, we’re proud to offer the complete EWI Pro A1 Mineral Render System that combines exceptional fire safety, thermal performance and long-lasting durability.
Recently certified with the A1 fire rating from a UK based testing lab - the highest level of fire resistance available - this mineral render system provides reassurance and protection across a wide range of projects from large-scale residential developments to private refurbishments. If you're seeking a render system that meets the latest fire safety regulations without compromising on performance or aesthetics, this is the solution you’ve been looking for.
What is the EWI Pro A1 Mineral Render System?
The EWI Pro A1 Mineral Render System is a high-performance external wall insulation (EWI) system designed with non-combustible components that contribute to a façade that is both robust, insulated and regulation-compliant. At its core is a carefully selected combination of fire-resistant materials designed to work in harmony, delivering long-term performance and safety.
The system includes:
Rockwool External Wall Dual Density Slab
The foundation of the A1 Mineral Render System starts with the Rockwool External Wall Dual Density Slab - a premium mineral wool insulation board. Renowned for its non-combustible nature, this insulation achieves Euroclass A1 fire classification on its own. It also provides:
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Exceptional thermal insulation
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Excellent acoustic performance
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Vapour permeability to reduce the risk of condensation
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Dimensional stability in all weather conditions
It’s the ideal substrate for any fire-conscious project looking to prioritise occupant safety and long-term building health.
Premium Basecoat EWI-225
Applied directly over the insulation is our EWI-225 Premium Basecoat, a high-performance adhesive and reinforcing layer. It’s designed specifically for mineral wool substrates, offering excellent bonding properties, breathability, and resistance to cracking. The basecoat sets the tone for a strong, durable façade and plays a crucial role in the fire rating of the complete system.
Premium Basecoat also provides:
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Dual-purpose, can be used as a basecoat and adhesive
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High strength
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Vapour permeable
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High elasticity
White / Orange Fibreglass Mesh
Embedded within the basecoat is White / Orange Fibreglass Mesh. This alkali-resistant mesh improves tensile strength and prevents surface cracking, ensuring the entire render system remains robust and visually consistent over time. Reinforcement is a critical component of the A1 Mineral Render System and this mesh provides long-term reliability.
Mineral Render EWI-060
Mineral Render is a breathable, mineral-based finishing coat designed specifically for mineral wool insulation systems. It contributes significantly to the fire safety of the system, offering:
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Euroclass A1 fire performance
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High vapour permeability
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Natural textured finish
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Quick drying in cool, damp conditions
This render is ideal for use on buildings where fire classification is a key concern, including high-rise buildings, schools, hospitals and other publicly accessed structures.
Silicone Paint EWI-005
To complete the system, Silicone Paint EWI-005 is applied as a final protective coating. While paint might seem like an aesthetic choice, it plays an important functional role in the A1 Mineral Render System. This silicone-based paint is highly breathable, water-repellent and dirt-resistant - protecting the underlying render from environmental degradation while maintaining vapour permeability.
EWI Pro Silicone Paint can also be ordered in a range of popular colours to suit the look and feel of any project, and still be A1 rated.
A1 Fire Rating: What It Means and Why It Matters
Our A1 Mineral Render System has now achieved full MW Fire Classification with Mineral Render + Silicone Paint, officially certifying the system as A1 rated—the highest level of fire performance under the Euroclass system.
This classification is more than a technical milestone—it’s a reflection of our commitment to designing safer buildings and delivering products that meet and exceed modern standards.