Fire rated internal doors (FD30): When to use Innervision FR

• 20 November 2025
• News

When specifying fire rated internal doors for a commercial or residential project, safety and design integrity must work hand in hand. Crittall’s Innervision FR range combines the brand’s signature steel elegance with proven fire protection, offering architects and contractors the reassurance of tested performance without compromising the aesthetic of a modern interior.

Understanding FD30 fire protection

An FD30 fire door provides a minimum of 30 minutes of fire resistance, meaning it can withstand flames and smoke for half an hour during the event of a fire. This timeframe is critical for preserving safe escape routes and allowing occupants to evacuate before conditions become life-threatening. In line with current  testing requirements  the entire door assembly, including the frame, glazing, hinges, and intumescent seals, must work together to achieve the specified period of protection.

For many commercial buildings, communal areas and blocks of flats, FD30 performance is a legal requirement under fire safety regulations and the Regulatory Reform (Fire Safety) Order. Ensuring compliance gives the responsible person and building control officers peace of mind that the correct level of passive fire protection has been provided.

Why choose Innervision FR

Crittall’s Innervision Fire Rated doors offer a refined solution for interior fit-outs where transparency, light and openness are key design priorities. The fire-resistant glazing, available in 7mm Pyrodur as standard, or optional Pyrostop, Pyrobel and Pyran S types, allows light to flow freely through internal spaces while maintaining a protective barrier against the spread of fire. Intumescent strips and seals expand under heat to block flames, preserving means of escape and reducing risk in adjacent areas.

Manufactured from the highest quality materials, each Innervision FR door features welded steel construction, hot-dip galvanizing to BS EN ISO 1461, and a Duralife polyester powder coating for long-term durability. The result is a system that meets rigorous fire safety standards while retaining the visual precision expected from Crittall.

Design without compromise

Unlike many modern fire doors, the Innervision FR range delivers full fire protection without sacrificing aesthetic appeal. Slim steel sightlines mirror the look of the wider Innervision internal doors range, allowing seamless integration across interior schemes. The collection can be specified in various styles, including single and double doors and fixed screens , all available with matching door accessories and hardware finishes.

The system is equally suited to heritage refurbishments, high-end residential projects or contemporary commercial interiors, offering both design flexibility and essential vital protection.

Specifying with confidence

For architects and contractors, the Innervision FR range simplifies compliance with building regulations while supporting creativity in interior design. Every product is crafted in Britain under ISO 9001 and ISO 14001 management systems, ensuring quality, consistency and traceability

When it comes to fire rated internal doors, Innervision FR provides both assurance and artistry, proving that safety can coexist with light, space and style.

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