The answer to 'why is my gutters sagging' is that sagging gutters are often caused by loose or damaged gutter hangers and brackets. Over time, the fasteners that hold the gutters in place can become loose or corroded, allowing the gutters to sag and pull away from the roof. This can also happen if the gutters are overloaded with leaves, debris, or excess water.
Sagging gutters can lead to water damage, leaks, and other issues, so it's important to address the problem promptly. In some cases, you may be able to fix sagging gutters yourself by tightening or replacing the gutter hangers and brackets. However, if the damage is more extensive or you're not comfortable working on a ladder, it's best to call a professional roofing contractor to inspect and repair the gutters.