General Information

A range of fire-resistant glass types is available in offering increasing levels of classified protection, which is measured in defined time periods (30, 60, 90, 120 and 180 minutes) and in terms of Integrity and Insulation or Integrity only as designated by the European Standards. It should be noted that fire-resistant glass must always be specified as part of a tested and approved glazing system, and installation should be carried out by specialists in order to ensure that the expected fire performance achieved should be called upon.

Insulation : The ability of a specimen of a separating element to restrict the temperature rise of the unexposed face to below specified levels. Temperature rise on the unexposed fire side shall not be more than 140ºC (average value) or 180ºC (maximum individual value) above ambient temperature

Integrity : The ability of a specimen of a separating element to contain a fire to specified criteria for collapse, freedom from holes, cracks and fissures and sustained flaming on the unexposed face.

Fire Classification
These diverse regulations and requirements for the use of fire-resistant glazing have led to the definition of the European standardised fire-resistance performance classification which comprises three classes :
  • Class EI : Fire-resistant glass in this category offers highest level of protection from fire, smoke and radiant heat for a defined period of time.
  • Class EW : Glass in this category offers an integrity performance (protection from fire and smoke) whilst reducing transfer of dangerous radiant heat.
  • Class E : Fire-resistant glass which remains transparent in the event of fire offers protection from fire and smoke event of a fire (integrity only performance). 
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