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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Hertfordshire · AL5
Fire-Resistant Glass in Harpenden
When a fire strategy, inspection report or building control comment in Harpenden calls for glazing tested to resist fire, our fire-resistant glass service covers survey, supply and installation.
E 30 – EI 120AL5England
Quote for Harpenden
Tell us what you need. We reply with next steps and a guide price.
Fire-Resistant Glass in Harpenden: what's included
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.
- Insulating (EI) intumescent-interlayer and gel-filled glass
- Impact-classified build-ups for critical locations
- Integrity (E) glass: modified toughened, glass-ceramic and polished wired types
- Glazing beads and fixings to the frame manufacturer's details
Key checks for Harpenden projects
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.
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.
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.
Areas we cover around Harpenden
We cover Harpenden and the surrounding postcode districts, including AL5, AL3. Nearby towns we also serve include St Albans, Luton, Hemel Hempstead. Harpenden lies roughly 18 km from Watford, within our Hertfordshire coverage.
Fire glass in St AlbansFire glass in LutonFire glass in Hemel HempsteadFire glass in Welwyn Garden CityFire glass in Hatfield
What you can expect in Harpenden
Work around occupied buildings
We can phase work in Harpenden around residents, staff or pupils, with out-of-hours options.
Honest about unknowns
If an existing frame in a Harpenden building has no traceable evidence, we say so and price the options rather than guess.
Rated systems, not just rated glass
Every quote in Harpenden identifies the tested system: frame, glass, beads, seals and fixings, within its pane-size limits.
Fire glazing rules in England
England Which rules apply?
Building work in England is covered by the Building Regulations 2010, with fire safety guidance in Approved Document B and impact safety guidance for glazing in Approved Document K.
Once a building is in use, the Regulatory Reform (Fire Safety) Order 2005 requires the responsible person to maintain fire safety measures, including fire-resisting glazing. The Fire Safety (England) Regulations 2022 add duties for multi-occupied residential buildings, including fire door checks in buildings over 11 metres.
Harpenden building types
Sector guides below cover schools and colleges, offices and other buildings in Harpenden.
Fire-Resistant Glass: Harpenden 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.
Which rules apply to fire-rated glazing in Harpenden?
Building work in Harpenden follows the Building Regulations 2010 and Approved Document B, and occupied buildings are covered by the Regulatory Reform (Fire Safety) Order 2005.
Do you work on occupied buildings in Harpenden?
Yes. We plan phasing, out-of-hours work and temporary protection so the building can stay in use where the fire strategy allows.
Related
Related services in Harpenden
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 →Process
How a Harpenden job runs
Tell us what you have
Send drawings, a fire risk assessment action or photos of the glass marks.
Survey
We visit Harpenden to measure, record existing marks and check the frames and substrate.
Written proposal
We set out the system, glass, evidence and programme, with a fixed price.
Complete and document
Work is completed to the manufacturer's details and documented for your records.