Wales · 44 postcode districts
Insulated Fire Glass (EI) for Gwynedd buildings
Our Gwynedd insulated fire glass service covers survey, supply and installation to the tested details, documented on handover.
EI 30 – EI 120WalesLL
Quote for Gwynedd
Tell us what you need. We reply with next steps and a guide price.
Insulated Fire Glass (EI): an overview for Gwynedd
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.
- Internal and external-grade build-ups
- EI 30, EI 60, EI 90 and EI 120 glass
- Insulating glass in sealed double-glazed units
Places we cover in Gwynedd
We cover insulated fire glass in Bangor and across Gwynedd, including Caernarfon, Holyhead, Pwllheli, Llangefni.
Before you order in Gwynedd
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.
Which rules apply in Wales?
Wales Which rules apply?
Building regulations are devolved in Wales, so fire safety design follows the Welsh Ministers' version of Approved Document B rather than the English one, alongside impact safety guidance for glazing.
The Regulatory Reform (Fire Safety) Order 2005 applies in Wales, so the responsible person must maintain fire-resisting glazing as part of the premises' fire safety measures. The Fire Safety Act 2021 confirmed this extends to the structure, external walls and flat entrance doors of multi-occupied residential buildings.
Wales is introducing its own building safety regime for occupied residential buildings, so check current Welsh requirements before planning major works to blocks of flats.
Insulated Fire Glass (EI) in Gwynedd: questions
Does EI glass need replacing after a fire?
Yes. Once the interlayers have reacted, the glass has done its job and must be replaced.
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.
Can EI glass be used outside?
Only products approved for external use, usually in a sealed unit with UV protection.
Which parts of Gwynedd do you cover?
All of it: Bangor, Caernarfon, Holyhead, Pwllheli, Llangefni and every district in the LL postcode areas.
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Process
How a Gwynedd job runs
Tell us what you have
Send drawings, a fire risk assessment action or photos of the glass marks.
Measure and check
We measure each opening in Gwynedd 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.