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ISO 12468-1:2013 specifies a test method to determine the resistance of roofs to external exposure to fire. This method evaluates the behaviour of the roof when exposed to three types of burning brands combined with wind and with or without heat radiation, concerning the fire spread across the external surface of the roof, the fire spread within the roof, the fire penetration, and the production of flaming droplets or debris falling through the roof, from the underside of the roof, or from the exposed surface.