Fire Glass

Class of Fire Rated Glass.

fire rated glass imageToday’s fire rated glass does not use wires in it substrate [ i.e. commonly know as Georgian wired glass].

Fire rate glass can provide fire protection from 30 minutes to 120 minutes, affording both radiant heat insulation, protection against smoke, flame penetration and impact safety.

Modern fire rate glass not only blocks the spread of fire but also remains cool on the side away from the fire.

The secret is an intumescent interlayer, which forms a heat opaque barrier. When a fire starts, the radiant heat is entirely absorbed by the interlayer/s.

When the interlayer reaches the reaction temperature, the interlayer/s evaporates thus consuming a major part of the energy released by the fire. Simultaneously, the interlayer expands generating thick, tough and viscous foam, keeping all glass pieces facing the fire in position and in tack.

During this reaction, the foam is in fact transformed into foam glass forming a rigid sandwich structure consisting of glass and foam glass that still provides full protection when the laminate sheets have cracked.

Over a period of time [depending on the rating], the temperature gradient through the glass structure can easily reach 500 C or more.

Fire rated glass offers retention of flames, protection against the primary fire and radiant heat [i.e. which could cause secondary fires to develop on the other side of the glass].

Moreover, radiant heat is a danger to people. Depending on the intensity of the radiation, the exposure for only a few seconds causes unbearable pain, severe injury or even death.

Fire Rating

30 min.

60 min.

90 min.

120 min.

Supply Form

Single Glazing

Single Glazing

Single Glazing

I.G. Units

Nominal Thickness

19 mm

23 mm

37 mm

54 mm

STC Rating approx. (dB)





fire rated glass image 2Class E: Integrity or the ability of the element to prevent the passage of flames, hot gases and smoke. Heat transfer is allowed through the glass.

Class EW: Integrity and Low Heat Radiation or the ability of the element to prevent the passage of flames, hot gases and smoke, and to limit the level of heat transfer through the glass.

Class EI: Integrity and Insulation or the ability of the element to prevent the passage of flames, hot gases and smoke and to block the heat transfer through the glass.