Which roof test involves turning flames on and off intermittently?

The intermittent flame test specifically involves the process of applying flames to a material at varying intervals, which recreates conditions that could occur in real-life fire scenarios. This test is designed to assess how a roofing material responds to short bursts of fire exposure, allowing evaluators to observe how well the material resists ignition and propagation of flames when subjected to this variable intensity of heat.

Understanding this test is crucial because it simulates how roofing materials might behave in situations where there are unexpected bursts of flames, such as during a wildfire or from nearby structures. The precise control of flame application and withdrawal helps in studying the specific characteristics of the roofing material under these challenging conditions, providing valuable data on fire safety and performance.