Repairing a Rain Gutter
The most general problem that you can encounter in a rain gutter is sagging, overflowing, leaking, and pooling runoff around the house. If left unattended, any one of these situations may result in severe water damage to the home and its base. Unfortunately, the fixes are within the realm of even a modestly experienced do-it-yourselfer.
The Primary Suspects Are the Joints Within Sections
If your gutters are leaking, the primary suspects are the joints within sections. Standing water in channels eventually will rust galvanized steel seams or seep through the seams in aluminum gutters.
Check for different signs of sagging and standing water. Adjust or add gutter hangers as needed.
Allow the interiors of the gutters to dry out, and brush leaking seams clean. Apply silicone or particular gutter caulking compound along the seams on the inside and outside to seal the leaks and avoid future problems to your roof.