E 30 – EI 120
Fire-Resistant Glass
Integrity and insulating fire glass supplied and fitted into tested frames.
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Hertfordshire · AL5
Harpenden insulated fire glass
For Harpenden buildings, we supply, replace and check insulated fire glass wherever the fire strategy depends on it, working to the tested system rather than the glass alone.
EI 30 – EI 120AL5England
Quote for Harpenden
Tell us what you need. We reply with next steps and a guide price.
What's involved with insulated fire glass in Harpenden
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.
- Matched glazing systems and seals
- Insulating glass in sealed double-glazed units
- EI 30, EI 60, EI 90 and EI 120 glass
- Internal and external-grade build-ups
Before you order insulated fire glass: what matters
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.
How it works
When heated, the interlayers turn opaque and expand, forming an insulating shield. After a fire the glass will need replacing.
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.
Which rules apply to insulated fire glass in Harpenden?
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.
Where we work around Harpenden
Coverage around Harpenden includes the AL5, AL3 districts and nearby St Albans, Luton, Hemel Hempstead. Harpenden is about 18 km from Watford, the largest town in our Hertfordshire coverage.
EI glass in St AlbansEI glass in LutonEI glass in Hemel HempsteadEI glass in Welwyn Garden CityEI glass in Hatfield
What every Harpenden quote includes
Fixed written quotes
After survey you get a fixed written quote for the agreed scope, so Harpenden budgets are not open-ended.
Work around occupied buildings
We can phase work in Harpenden around residents, staff or pupils, with out-of-hours options.
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.
Building types we cover in Harpenden
We can survey and quote for schools and colleges, public buildings and other building types in Harpenden.
FAQs for Harpenden
What does EI 60 mean?
The glazing system kept fire on one side (integrity) and limited the temperature rise on the other side (insulation) for at least 60 minutes in a standard fire test.
Is EI glass clear?
Yes, in normal conditions. It turns opaque only when heated in a fire.
Can you price insulated fire glass in Harpenden from photos?
We can give a guide range from photos and sizes, including a clear photo of any marks on the glass. A fixed price follows a survey.
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.
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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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
How a Harpenden job runs
Start with the brief
Tell us the rating required, sizes and building type, or ask us to find out.
Site visit
A survey in Harpenden confirms sizes, access, existing evidence and fixing conditions.
Written proposal
We set out the system, glass, evidence and programme, with a fixed price.
Fit and record
We install, photograph seals and fixings before closing up, and hand over the schedule.