What type of roofs are often found on houses and apartment buildings to facilitate water drainage?

Pitched roofs are designed with an inclination that promotes efficient water drainage. This design is essential for preventing water accumulation, which can lead to structural damage and leaks. Pitched roofs allow rainwater and snow to slide off easily, reducing the risk of water pooling on the roof surface. The angle of the pitch can vary, but the primary goal remains the same—effective drainage to protect the building.

Flat roofs, while they may facilitate certain drainage systems, are not designed solely for this purpose. Instead, they often require additional features, such as drainage systems or sloped areas, to ensure proper water runoff.

Curved and domed roofs are typically not found on residential homes and apartments. These designs can make drainage more complex, and while they have their own advantages, they are not primarily aimed at facilitating drainage like pitched roofs do. Thus, pitched roofs serve as the most effective option for promoting water drainage in buildings.