90 Minute Fire Rated Windows
FIRE RESISTANT WINDOW, DOOR AND PARTITION SYSTEM WITH EI90 FIRE RATINGS
90 minute fire rated windows
Welcome to Aluminium Fire Systems, where we supply 90 minute fire rated windows engineered for projects demanding the highest level of fire protection. With an EI90 classification, these windows can withstand intense heat and flames longer than standard fire rated systems, providing an extra layer of safety for both occupants and property.
What Are 90 Minute Fire Rated Windows?
90 minute fire rated windows – often referred to as EI90 – are specifically tested to endure direct exposure to fire, smoke, and heat for up to 90 minutes. This extended resistance helps maintain critical structural integrity, confine the spread of flames, and ensure additional time for safe evacuation.
Key Technical Highlights
1. Fire Resistance Classification
- Integrity (E): Contains flames and prevents them from breaking through the window assembly.
- Insulation (I): Reduces heat transfer to the protected side, minimizing the chance of secondary ignition.
2. Specialised Glazing
- Multi-Layer Fire Glass: Composed of multiple panes with intumescent interlayers that expand under high temperatures.
- Glass Thickness: Typically in the 40–60 mm range, depending on specific requirements and any additional acoustic or thermal performance needs.
3. Advanced Aluminium Frames
- Thermally Broken Profile: Incorporates a polyamide thermal barrier to enhance insulation and stability.
- Structural Reinforcement: Reinforced chamber design to handle prolonged exposure to fire and heat.
4. Certification & Testing
- EN 13501-2: Demonstrates compliance with European fire safety standards.
- BS 476: Part 22: Relevant UK standard for fire tests on building materials.
- System Approach: All components – glass, frame, seals – are tested together, ensuring reliable, real world performance.
Advantages of 90 Minute Fire Rated Windows
- Extended Protection
EI90 windows offer substantially more time for emergency response and occupant evacuation, a critical factor in high-risk environments. - Robust Design
Thicker glass and reinforced profiles deliver durability, helping maintain performance in complex or large-scale applications. - Thermal & Acoustic Benefits
Thanks to multiple layers of glass and thermally broken frames, EI90 windows can also enhance sound insulation and energy efficiency. - Versatile Aesthetics
Our aluminium frames can be finished in a range of RAL colours or anodized coatings, allowing architects to blend fire safety with a modern, cohesive design. - Regulatory Compliance
With rigorous testing and certifications, 90 minute fire rated windows often fulfill or exceed code requirements in high-occupancy and high-risk structures.
Where to Use 90 Minute Fire Rated Windows
- High-Rise Commercial Towers
Enhances overall building safety in skyscrapers where evacuation time is crucial. - Industrial & Warehouse Facilities
Offers stronger compartmentalisation in areas containing flammable materials or advanced machinery. - Public Venues
Suitable for large auditoriums, theatres, and arenas where crowds need extended evacuation windows in emergencies. - Hospitals & Care Facilities
Extra time can be essential when moving patients with limited mobility.
Our Products
fire rated windows
For more information on our fire rated windows and products please visit our
Fire Rated Aluminium Windows
fire rated doors
For more information on our fire rated doors and products please visit our
Fire Rated Aluminium Doors
fire rated partitions
For more information on our fire rated partitions and products please visit our
Fire Rated Glass Partitions
Contact Us
For further details or to request a quote on 90 minute fire rated windows, don’t hesitate to contact us:
- Phone: +44 121 277 4870
- Email: [email protected]
At Aluminium Fire Systems, we’re committed to delivering top quality, certified fire rated solutions that protect your building – and everyone inside it. Reach out today to discuss how our EI90 windows can provide the robust fire protection and design flexibility your project demands! Free Quote Form here.