A standard gutter, made of metal or PVC, is a trough attached to a roof's edge to collect and divert rainwater.

A valley gutter, V-shaped at intersecting roof slopes, collects and directs rainwater to eaves or downpipes, preventing leaks.

A box gutter is a concealed, rectangular drainage system that directs rainwater to downpipes in large buildings.

A roof-to-roof gutter diverts rainwater between adjacent roofs, preventing pooling in attached buildings or complexes.