Which roof test combines flames with electrical current?

The flying brand test is designed to evaluate the fire resistance of roofing materials by simulating the conditions that a roof might experience during a fire. This test combines flames with an electrical current to create a more realistic and demanding scenario. The electrical current ignites the material, while the flame assesses the material's ability to withstand prolonged exposure to heat.

This testing method is crucial for determining how well a roofing system can resist ignition and prevent fire spread, thereby ensuring safety in the construction and maintenance of buildings.

The other tests mentioned do not incorporate both flames and electrical current in their methodologies. The continuous and intermittent flame tests typically focus solely on flame exposure, and the burning brand test often involves simulating the exposure of a roof to a burning ember rather than the combination of flame and electricity. As such, the flying brand test stands out for its comprehensive approach to fire behavior assessment.