It is the way in which a material (concrete, wood, paper…) will behave as a fuel. This reaction is defined after standardized tests in approved centers.
Extract CTS art. 8 “The roofing, the possible double interior roofing and the belt of the establishment must be made of materials of category M 2 whose report of classification in reaction to fire does not include a limit of durability (1).”
|M0||non-combustible||stone, brick, cement, tiles, lead, steel, slate, ceramic, plaster, concrete, glass, rock wool, Staff|
|M1||non-flammable||composite materials, rigid PVC, mineral slabs for false ceilings, some fireproofed woods, some fireproofed polyesters|
|M2||hardly flammable||wall-to-wall carpeting, particle board|
|M3||moderately flammable||wood (including glued laminate), rubber flooring, polyamide carpeting, wool|
|M4||easily flammable||paper, polyester, polypropylene, mixed fiber carpet|