Which roof type features a steeper lower slope and shallower upper slope?

The gambrel roof is characterized by its unique shape, featuring a distinct profile that includes a steeper lower slope and a shallower upper slope. This architecture is often associated with barns and traditional buildings, allowing for increased headspace and usable attic or loft areas. The steep lower slope provides effective runoff for rain and snow, while the shallower upper slope aids in maximizing interior space without significantly adding to the height of the structure. This design combines aesthetic appeal with functional considerations, making it a popular choice in certain architectural styles.

In contrast, gable roofs have two sloping sides that meet at a ridge, while hip roofs slope on all sides, creating a more uniform pitch. Flat roofs have minimal pitch, which is quite different from the gambrel's design, resulting in distinct functional and aesthetic attributes for each type of roof.