Gutters and downspouts are the unsung hero of your home. When properly functioning, they go a long way toward protecting against rain, the natural enemy of any manmade structure. In the process, gutters prevent a slew of potentially extensive, expensive moisture-related problems, all while remaining largely out of sight and out of mind. Though well-maintained, high-quality gutters can be expected to last many years, they certainly don't last forever. Click through to learn what signs might indicate the time has come to replace yours.