EI 30 – EI 120
Insulated Fire Glass (EI)
EI 30 to EI 120 glass that blocks heat as well as flames.
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E 30 to EI 120
Fire-Resistant Glass
Fire-resistant glass is glazing that has been tested, as part of a complete glazed system, to hold back fire for a set time. It is classified by what it stops: E (integrity) keeps flames and hot gases on the fire side, EW also limits the heat radiated through the glass, and EI (integrity and insulation) also limits the temperature rise on the protected side, so people can pass it more safely.
E 30EW 30EI 30EI 60EI 120
Get a free survey or quote
Tell us what you need. We reply with next steps and a guide price.
- Free quotation visitfor installation work
- Written quotesafter survey, for the agreed scope
- UK-wide coverageall four nations
- Tested systems onlyglass, frame, seals as tested
- Evidence on handoverclassifications and photos
What does our fire-resistant glass service include?
We supply and fit fire-resistant glass into new and existing fire-rated frames, matching the glass type, thickness, beads, seals and fixings to the test or assessment evidence for that frame. The glass on its own does not carry a rating; the combination does, so we start every job by identifying the system you have or need.
- Integrity (E) glass: modified toughened, glass-ceramic and polished wired types
- Integrity with radiation control (EW) laminated glass
- Insulating (EI) intumescent-interlayer and gel-filled glass
- Intumescent glazing seals, tapes and gaskets to the tested specification
- Glazing beads and fixings to the frame manufacturer's details
- Impact-classified build-ups for critical locations
What should you check before ordering?
Which classification do you actually need?
The fire strategy or building control drawings set the rating for each element. Integrity-only glass is cheaper and thinner, but its use on escape routes is restricted; insulating glass carries far fewer restrictions because people can pass it safely during a fire.
Can any fire glass go in any fire-rated frame?
No. A frame is only rated with the glass types and pane sizes it was tested or assessed with. We check the frame's evidence before quoting, and if the existing frame is unknown we say so and price the options.
Inside or outside?
Many insulating fire glasses use interlayers that need protecting from UV and moisture, so external positions need a product approved for exterior use, with the right edge seal and glazing system.
Impact safety still applies
Glass in doors, side panels and low-level positions has to meet impact safety rules as well as the fire rating. Most modern fire glass carries an impact classification; old wired glass usually does not.
Weight and handling
Insulating fire glass gets thicker and heavier as the rating rises. Large EI 60 and EI 120 panes often need lifting equipment and a frame designed for the load, which we plan before the delivery date.
Marking and records
Most fire glass is permanently marked with its product and classification. We record the marks, pane sizes and evidence references on handover so whoever is responsible for fire safety can show what is installed.
What evidence do you get?
- Glass product data and classification to BS EN 13501-2
- Frame test or assessment reference
- Glazing schedule with pane sizes and marks
- Photographs of beads, seals and fixings before closing up
Guide prices for fire-resistant glass
E 30 glass from £180/m², EI 30 from £350/m², EI 60 from £550/m², supplied and fitted, excluding VAT. Prices depend on the rating, pane sizes, frame system, access and programme. Use the guide price tool for a range, or see all guide prices.
Frequently asked questions
What is the difference between E, EW and EI fire glass?
E is integrity only: it stops flames and hot gases passing for the rated time. EW adds a limit on radiated heat through the glass. EI adds insulation, keeping the unexposed face below set temperature rises so people can pass it safely. The number after the letters is the time in minutes.
Is toughened glass fire-resistant?
Ordinary toughened safety glass is not. It can shatter early in a fire. Fire-resistant integrity glass is specially processed or formulated and only gains a rating when fitted in a tested frame and glazing system.
How thick is fire-resistant glass?
Integrity glass can be similar in thickness to standard glass. Insulating glass is laminated from several layers, so it gets markedly thicker and heavier as the rating increases from EI 30 to EI 120.
Can you match glass that is already installed?
Often, yes. We read the marks on the existing panes and check them against the frame evidence. Where the original product is discontinued we look for an alternative covered by the same evidence or a formal assessment.
Do you supply fire glass only?
Our service is supply and installation, because the rating depends on how the glass is fitted. For trade buyers we can quote supply of cut-to-size panes with the matching glazing materials on request.
Related services
Often specified alongside fire-resistant glass
E · EW
Integrity Fire Glass (E & EW)
E and EW glass where flames and hot gases must be stopped.
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like-for-like
Broken Fire Glass Replacement
Cracked or broken fire glass replaced to the original specification.
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E 30 – EI 120
Fire-Rated Glazed Screens
Internal glazed screens that keep compartments and corridors protected.
Learn more →Areas
Fire-Resistant Glass by area
Select your county or region for local coverage, towns and the rules that apply there.
England
BedfordshireBerkshireBristolBuckinghamshireCambridgeshireCheshireCornwallCounty DurhamCumbriaDerbyshireDevonDorsetEast Riding of YorkshireEast SussexEssexGloucestershireGreater LondonGreater ManchesterHampshireHerefordshireHertfordshireIsle of WightKentLancashireLeicestershireLincolnshireMerseysideNorfolkNorth YorkshireNorthamptonshireNorthumberlandNottinghamshireOxfordshireRutlandShropshireSomersetSouth YorkshireStaffordshireSuffolkSurreyTyne and WearWarwickshireWest MidlandsWest SussexWest YorkshireWiltshireWorcestershire
Scotland
Process
How we deliver fire-resistant glass
Tell us what you need
Send sizes, the rating required, photos of glass marks or your inspection report.
Survey
We measure, record existing marks and check frames, substrates and fire-stopping.
Written quote
Your quote names the tested system, classification and evidence it relies on.
Install and hand over
Installed to the system details, then a handover pack with photographs and references.