The answer to 'why is my downspouts sagging' is that downspouts can sag for a few common reasons, such as improper installation, age and wear, or damage from weather or debris. Sagging downspouts can cause water to pool around your home's foundation, leading to potential leaks and water damage.
Some of the most common causes of sagging downspouts include: loose or missing fasteners that secure the downspout to the wall, settling or shifting of the ground that the downspout is mounted on, and damage from heavy snow, ice, or fallen branches. Over time, the weight of water flowing through the downspout can also cause it to gradually sag and pull away from the wall.