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Fire Resistant Glazing

Our experience in fire resistant glazing gained over thirty years, is unsurpassed in the UK. With projects ranging from fire doors to multi-million pound projects.  We have worked on some amazing projects from the Halley V1 Antarctic research station to King’s Cross railway station and Marks and Spencer’s Head Quarters.

We offer a range of fire resistant systems as well as our patented FireLine system which is loved by architects for its super fine sight line without compromising the fire resistant properties of the structure.

Office buildings, museums, hospitals, apartment blocks and homes all now benefit from the fire resistant properties of constructional glazing, while the introduction of aesthetic steel doors has further improved public safety. Refurbishment schemes great and small similarly benefit from the introduction of such modern materials designed to meet the most stringent of fire regulations.

Internal spaces become lighter and brighter with the use of glass balustrades, partitions and atria but in response to increasing demands for glass to provide a passive fire-resisting barrier, there are many products and considerations to weigh. Fire resistant glazing allows you to see the hazard, enabling safer evacuation.

Fire Glazing Terms

Determining the fire strategy of any building begins with understanding to key terms: integrity means the length of time fire will be contained whereas insulation is the time people are protected from radiant heat. Insulation times should allow for the safe evacuation from the building and also allow emergency services to be protected when dealing with the fire, and the rating should apply to both the glass and the framing system.

Fire Resistant Glazing

The use of fire resistant glazing in modern buildings allows light and vision, improving the user experience whilst protecting against the threat of fire.

Modern buildings rely increasingly on the provision of natural light to the core of the building through internal atria capped with glazed roof areas. Subject to the fire strategy of the building, fire resistant glazing may be required for internal atrium walls to provide compartmentalisation, yet allowing natural light to penetrate deep into the building. Where external facades require fire protection, for means of escape or boundary wall application, fire-resistant glazing can equal the aesthetic and thermal properties of any non-fire rated glazing system.

Fire Doors

Doors play an important part in any fire protection strategy. They provide both passive protection and a clear escape route alongside standard access and egress functions. Today’s fire doors can be manufactured in timber or steel with various glass options. Building Regulations and Approved Documents specify periods of fire and smoke protection required but in terms of integrity only. With the development of advanced systems, insulated steel glazed doors can also be offered.

When incorporated into a glazed screen or partition they should be treated as ‘door sets’ with specific hardware fitted to comply with fire test data. Not all doors can be supplied to site for retrofitting of hardware as these are often predetermined with an ironmonger not familiar with the door system. Fire doors are enshrined within Building Regulations, a vital building element requiring careful consideration throughout design and construction process, so decisions concerning the latest steel or traditional timber alternatives are not to be taken lightly.

Fire Certificate

All FireLine fire glazing systems are installed by experienced, highly trained installers and the relevant Fire Certificate is issued upon completion of the project.

Understanding Fire Resistant Glazing Terminology

The British Standards (BS) that refer to fire resistant glazing are, BS476 Part 20 & Part 22.

The European Standards are: EN13501-2, EN 1363, EN1364, EN1365, and EN1364. The European definitions referring to fire resistant glass are shown below:


Integrity is the ability of the glass and/or frame to contain the flame for the period of time for the integrity specified. Glass is specified as 30/0 or E 30 meaning the fire will be contained for 30 minutes.


Insulation is an additional function to Integrity. All fire resistant glass have integrity; not all have insulation. Insulating glasses and frames will contain the rise in temperature on the non fire side. The rating is expressed as 30/30 or EI 30 meaning that both fire and heat will be contained for 30 minutes.

Maximum Integrity and Insulation values are typically 120/120 or EI120 at a standard time temperature curve however Fendor’s HydroCarbon window achieved 46 minutes Insulation and over an hours’ integrity during a hydrocarbon fire test where the temperature is an almost instant 1000˚C.

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