Reaction to Fire

Asses a construction material's contribution to the development and spread of a fire with a reaction to fire test.

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Reaction to Fire testing examines the characteristics, such as combustibility, of building materials to determine their contribution to fire development and spread. Such materials can be classified into one of seven classes under BS EN 13501-1 according to their reaction to fire:

A1 – Non-combustible materials, do not contribute to the development of a fire
A2 – Materials with limited combustibility, do not contribute to the development of a fire
B – Combustible, limited contribution to fire
C – Combustible, minor contribution to fire
D – Combustible, contributes to fire
E – Combustible, will only resist a small flame for a few seconds
F – Materials that have not been classified or have not met minimum requirements of class E.

To obtain a classification, products are tested according to the following test methods:

A table featuring the classification results and the relevant test methods including BS EN ISO 1416, BS EN ISO 1182, BS EN ISO 13823, BS EN ISO 11925-2

Reaction to Fire Testing Services

Single Burning Item (SBI)

BS EN 13823:2020

This procedure specifies a method of test for dertermining the reaction to fire performance of construction products when exposed to thermal attack by a single burning item (SBI).

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Small Flame

BS EN ISO 11925-2:2020

This test determines the potential maximum total heat release of a product when completely burned, regardless of its end use. This method determines the absolute value of the heat of combustion for a product without accounting for inherent product variability.

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Non - Combustibility

BS EN ISO 1182:2020

This test identifies products that will not, or not significantly, contribute to a fire, regardless of their end use. This fire test has been developed to select construction products which produce a very limited amount of heat and flame when exposed to temperatures of approximately 750 °C.

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Calorific Value

BS EN ISO 1716:2018

This method specifies a test for determining the ignitability of products by direct small-flame impingement under zero impressed irradiance using vertically oriented test specimens.

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