Rain gutter

A channel attached to a roof edge that collects rainwater and carries it to downspouts or another drainage system.

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Downspout: A pipe that carries water from a roof gutter to ground-level drainage. It receives water at the gutter’s outlet and conveys it downward.
Eaves: The lower edges of a roof that extend beyond a building’s walls. Gutters are commonly mounted along these roof edges.
Foundation drainage: Methods for moving water away from a building’s foundation. Gutters reduce concentrated roof runoff beside the foundation when outlets discharge appropriately.
Scupper: An opening through a parapet or wall that drains water from a roof or deck. Unlike an attached channel, it lets roof water pass directly through an edge.
Gutter slope: The downward pitch that directs water along a gutter toward an outlet. A slight slope prevents standing water and guides runoff to the downspout.
Fascia board: A board fixed along the ends of roof rafters at the roof edge. It often provides the surface to which a gutter is attached.
Rainwater tank: A storage vessel for collected rainwater. A downspout can feed gutter runoff into a tank for later use.
Box gutter: A concealed roof drainage channel built into a roof or its structure. Its integrated placement contrasts with an exposed gutter fixed at the eaves.
Gutter guard: A screen or cover designed to keep leaves and debris out of a gutter. It limits blockages that can interrupt runoff through the channel.
Seamless gutter: A gutter formed on site as one continuous length for a roof edge. Fewer joints can reduce leak points compared with sectional gutters.