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Fire-Rated Glass Units

Integrity and insulation glazing for fire compartmentation, fire doors, escape routes. E30 to EI60 classifications. Pyroguard®, Pilkington Pyrostop®, SGG Contraflam®. Must be installed in tested approved framing.

E30 to EI60PyroguardPyrostopContraflamPart B

Overview

Fire Glass — E30 to EI60

Fire-rated glass provides fire resistance for a defined period during a fire. Classifications: E (integrity — prevents flames and hot gases), EW (integrity + radiation control — limits heat to <15 kW/m²), EI (integrity + insulation — limits temperature rise to <140°C on the unexposed face). EI-rated glass contains intumescent gel layers that expand in fire, forming a rigid opaque insulating shield.

Fire Ratings & Products

Rating	Class	Thickness	Max Panel	Weight/m²	Products
E 30	Integrity	6-7mm	1500×2500	16-18 kg	Pyroguard, Georgian wired
E 60	Integrity	7-10mm	1400×2400	18-25 kg	Pyroguard, Borosilicate
EW 30	Radiation	10-15mm	1300×2400	25-37 kg	Pilkington Pyrodur
EI 30	Insulation	15-21mm	1200×2400	37-52 kg	Pyrostop, Contraflam 30
EI 60	Insulation	25-33mm	1100×2300	62-82 kg	Contraflam 60

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Integrity ratings compared at a glance:

Fire Performance

Integrity Classes — Minute Ratings

E30

30 min

E60

60 min

EI30

30 min

EI60

60 min

E = Integrity — flame and hot gases held back for the stated period. EI = Integrity + Insulation — also limits heat transfer through the unexposed face.

How Intumescent Fire Glass Works

EI-rated glass contains multiple clear intumescent gel layers between glass plies. Under normal conditions the gel is completely transparent. In a fire, each gel layer reacts to rising temperature by expanding and turning opaque white, forming a rigid insulating foam shield. Layers activate in sequence as temperatures increase, providing sustained protection. The unexposed face stays cool (below 140°C).

Critical Installation Requirements

Approved framing ONLY: Must use tested, approved fire-rated frame systems
Intumescent seals: Glazing tape/strips must match tested specification exactly
No site modification: Fire glass CANNOT be cut, drilled or modified on site
Rating match: Glass rating must ≥ wall/partition fire resistance period
Building control: Every installation must be signed off by building control

From Delivery to Fitting: Fire-Rated Units

On arrival — check edge seals and move units straight onto covered A-frames. Intumescent interlayers must stay dry, so never store flat or outdoors.
Moving — these builds run heavier than a standard DGU: suckers above 25 kg, mechanical kit above 60 kg.
Waiting — cork pads between units, no glass-on-glass contact, and no more than 28 days in storage.
Fitting day — bring units up to room temperature gradually and postpone if the site is below 5°C.

Allow 7-14 days for manufacture depending on glass availability.