What effect does improper roof slope have on drainage?

Improper roof slope significantly affects drainage by causing water to pool, which can lead to various issues, including an increased risk of leaks. A roof is designed with a specific slope to facilitate the flow of water towards drainage points, such as gutters and downspouts. When the slope is inadequate, water does not drain efficiently; instead, it accumulates in low spots. This standing water can cause several problems, such as membrane degradation, increased weight on the structure, and the potential for leaks to develop as water penetrates roofing materials.

Unlike options suggesting benefits such as helping in water extraction, promoting drainage, or aiding drying, improper slope negatively impacts roof performance, making option C the accurate choice. Addressing proper roof slope is essential in roofing design and installation to ensure effective water management and prolong the lifespan of the roofing system.