Which type of roof design features a ridge at the center and slopes in two directions?

A roof design that features a ridge at the center and slopes in two directions is known as a gable roof. This design consists of two triangular sections that slope downwards from the ridge, creating distinct vertical ends where the walls meet the roof. Gable roofs are commonly used in various structures due to their efficient shedding of water and snow, allowing for better drainage and reducing the risk of water damage.

The gable roof's ability to enhance ventilation and light within the building is also a key advantage. Its symmetrical shape provides a classic appearance, commonly seen in residential buildings, thereby contributing to aesthetic appeal. Additionally, the simplicity in construction and materials makes gable roofs a preferred choice in many regions, especially where high winds or heavy rainfall may occur.

In contrast, a shed or lean-to design has a single slope and does not have a ridge; a hip roof features slopes on all four sides, meeting at a common point, while a flat roof lacks slope and often requires additional drainage systems. Thus, the defining characteristics of a gable roof make it distinct among other roof designs.