If the gutter system is installed incorrectly it isn't going to be able to do its job. Your gutters should be directly underneath the edge of your roof with half sticking out and half underneath closer to the exterior wall. This will allow it to catch all degrees of rainfall- from sprinkling to a rainstorm. Gutters can help you install your gutter to direct the greatest amount of rain flow.
The water spouts are very important to getting the collecting rainfall away from your foundation. Sitting water can be a big hazard to your home's structural integrity. These "downspouts" also be made from aluminum, copper, cast iron, and steel.
Old houses often need their water spouts to be replaced every decade because they withstand a lot of wear and tear over the years. For more information on downspout maintenance, search online for Gutters companies at https://guttermeshdirect.com.au/. They can give you suggestions and quotes on replacements.
Those who have already taken care of installing their gutter systems shouldn't think they're off the hook. Gutters need to be looked at as often as every six months. Water can wreak havoc in a short amount of time.
What you should be looking for are droopy areas where the gutters half round may have come loose or holes allowing water to go places where it shouldn't.