E 30 – EI 120
Fire-Resistant Glass
Integrity and insulating fire glass supplied and fitted into tested frames.
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Hertfordshire · SG4
Hitchin insulated fire glass
We provide insulated fire glass in Hitchin and across Hertfordshire, working from the classification your building needs and handing over the evidence that proves what was fitted.
EI 30 – EI 120SG4England
Quote for Hitchin
Tell us what you need. We reply with next steps and a guide price.
What our insulated fire glass service includes in Hitchin
EI glass is the choice where people need to pass close to the glass during a fire, where combustible materials sit near it, or where building guidance would otherwise restrict glazing. We supply and fit EI 30 to EI 120 glass in tested frames, internally and externally.
- EI 30, EI 60, EI 90 and EI 120 glass
- Impact-classified insulating glass
- Insulating glass in sealed double-glazed units
- Matched glazing systems and seals
Before you order insulated fire glass: what matters
Storage on site
Insulating fire glass should be stored dry, upright and away from direct sun before fitting.
The temperature rule
EI testing limits the average temperature rise on the unexposed face to 140°C and any single point to 180°C, which is why people can pass it.
Thickness and weight
Each step up in rating adds layers, so EI 120 is far thicker and heavier than EI 30. The frame has to be designed for it.
England regulations that shape the job
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.
In higher-risk buildings, broadly 18 metres or seven storeys with two or more homes, the Building Safety Regulator is the building control authority. England is also phasing out BS 476 references from Approved Document B, with the remaining fire-resistance references due to go in September 2029.
Hitchin coverage and nearby towns
Our Hertfordshire coverage takes in Hitchin (SG4, SG5) and the neighbouring towns of Letchworth Garden City, Stevenage, Luton. Watford, around 34 km from Hitchin, is the largest town in the same coverage area.
EI glass in Letchworth Garden CityEI glass in StevenageEI glass in LutonEI glass in HarpendenEI glass in Ampthill
How we work in Hitchin
Fixed written quotes
After survey you get a fixed written quote for the agreed scope, so Hitchin budgets are not open-ended.
Honest about unknowns
If an existing frame in a Hitchin building has no traceable evidence, we say so and price the options rather than guess.
England rules applied
Designs follow the building and fire safety rules that apply in England, not a one-size-fits-all approach.
Sectors we cover in Hitchin
Sector guides below cover schools and colleges, blocks of flats and other buildings in Hitchin.
FAQs for Hitchin
Does EI glass need replacing after a fire?
Yes. Once the interlayers have reacted, the glass has done its job and must be replaced.
Is EI glass clear?
Yes, in normal conditions. It turns opaque only when heated in a fire.
Do you carry out insulated fire glass in Hitchin?
Yes. We survey and install in Hitchin and across Hertfordshire, including the SG4 district and nearby Letchworth Garden City.
How quickly can you survey in Hitchin?
Survey timing in Hitchin depends on access, the size of the building and how urgent the defect is. Tell us your deadline when you enquire and we will confirm a date before you commit.
Related
Related services in Hitchin
E · EW
Integrity Fire Glass (E & EW)
E and EW glass where flames and hot gases must be stopped.
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E 30 – EI 60
Stair, Lobby & Corridor Glazing
Glazed screens and doors on protected stairs, lobbies and corridors.
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E 30 – EI 60
Frameless Fire-Rated Glazing
Butt-jointed fire glass walls with minimal frames.
Learn more →Process
From enquiry to handover in Hitchin
Share the details
Send the fire strategy extract, inspection report or a few photos of the openings.
Measure and check
We measure each opening in Hitchin and check what the existing frames can accept.
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.