Metairie’s mature tree canopy means leaves and debris are a real, ongoing problem for open gutters, on top of the rainfall itself. Gutter guards cut down on how often gutters need to be cleaned out, and they address a different cause of overflow than sizing does: a clog, not a system that’s too small.
No guard makes a gutter maintenance-free forever. Fine debris like pine needles can still get through some styles, and guards still need an occasional check. But for most Metairie homes near mature trees, they’re worth the upfront cost in reduced cleaning and fewer clog-related overflows.