Fire-resistant glass can be classified in two categories: Fire-resistant glass - heat transmitting glass: contains flames and inflammable gas for a short period of time, but does not prevent the transmission of heat to the other side of the glazing.(example: wired glass, reinforced laminated glass). Fire-resistant glass - fire-insulating glass: contains flames and inflammable gas for a longer period of time and prevents not only the transmission of flames and smoke but also of heat to the other side of glazing.