Which of the following roof types is least complex in design?

The gable roof is considered the least complex in design due to its straightforward structure. It consists of two sloped sides that meet at a peak, forming a triangular shape. This simplicity not only makes it easier to construct but also allows for effective water drainage, reducing the risk of leaks or water accumulation. Its design inherently provides good ventilation and can accommodate various roofing materials, contributing to its practicality and efficiency.

In contrast, a hip roof features slopes on all four sides, which adds to the complexity of its construction and design. Flat roofs may appear simple, but they still require careful consideration for drainage and waterproofing to prevent water pooling and leaks. Intersecting roofs involve multiple roof planes and angles, increasing the design complexity significantly. Each of these other roof types introduces additional challenges that the gable roof does not face, solidifying its status as the least complex option.