Roofing is made of organic materials. These are combustible, even though they hold fire classifications.
The calorific value is a measurement of the amount of energy that will be released from a material in a fire. This energy can be measured in mega joule (MJ) or kilo watt hours (kWh) per kilogram or per litre. As far as roofing is concerned, it is most expedient to specify calorific values in MJ or kWh per square metre of the covered roof surface.For further information, please click here.