Which ladder type is typically used for rescue and ventilation on sloped roofs?

The roof ladder is specifically designed for use on sloped roofs, making it the ideal choice for rescue and ventilation operations in those settings. This type of ladder features hooks at the top, which can be secured over the ridge of the roof, providing stability and allowing firefighters to work safely at heights. The flat rungs of a roof ladder also facilitate easier movement and provide a stable platform for personnel while they perform their tasks on the sloped surface.

In contrast, the extension ladder is versatile and can reach high places but does not secure to the roof in the same manner, making it less suitable for operations specifically on sloped roofs. The folding ladder is more portable and useful in situations requiring smaller ladders indoors or where space is limited, while the step ladder is designed for low-height tasks and is not suitable for roof work at all. Thus, the roof ladder stands out as the most appropriate choice for rescue and ventilation on sloped roofs, given its design and intended use.