Why is keeping blades cool during roofing cuts important?

• A. It speeds up cutting by heating
• B. It helps prevent ignition of gas or materials and reduces blade wear
• C. It has no impact on safety
• D. It indicates gas present

Answer: (B)

Keeping blades cool during roofing cuts is crucial because the friction heat from cutting can ignite flammable vapors or materials on the roof, such as asphalt, solvents, or any gas leaks. A cooler blade also experiences less thermal stress, which means reduced wear, less dulling of teeth, and a lower risk of warping or blade failure. In short, cooling protects both crews from fire hazards and helps the blade perform reliably and last longer. Heating the blade would be dangerous and does not improve safety, and cooling does not indicate whether gas is present.