What is a likely result of inadequate roof drainage?

Inadequate roof drainage can lead to the accumulation of water on the roof, resulting in excessive weight and pressure on the roofing structure. This persistent water build-up can create an environment conducive to various issues, such as leaks that compromise the integrity of the roof and may lead to materials deteriorating over time. Additionally, the excess moisture can weaken structural elements, potentially causing sagging or even structural failure if the problem is not addressed.

While options like enhanced energy efficiency, rust development, and improved air circulation may seem relevant in different contexts, they do not directly stem from inadequate drainage. Inadequate roof drainage inherently carries the risk of structural damage due to the ongoing strain and deterioration it causes. Thus, the likelihood and seriousness of structural damage make it the most relevant consequence of poor drainage practices.