Aluminium metal is “non-combustible”, meaning that it does not burn when exposed to fire. For this reason, it belongs to the best European reaction to fire class ‘A1’.
Aluminium outer cladding can come in the form of aluminium sheet (bare, coated or anodised) or aluminium composite material (ACM). Bare and anodised aluminium sheets and a wide range of coated aluminium sheets are non-combustible. ACMs are available with various core materials, including fire retardant and non-combustible options.
When used in exterior ventilated facade, the outer cladding is the visible part of the system that protects the wall insulation from the rain, separated from each other by an air gap. The outer cladding material, wall insulation material and fire barriers all have an influence on the flammability of a facade.