Lot of rainwater is flowing through the gutter to canalization. Sound included. A rain gutter is a narrow channel, or trough, forming the component of a roof system which collects and diverts rainwater shed by the roof. It is also known as an eavesdrop, eaves channel, guttering or simply as a gutter. The main purpose of a rain gutter is to protect a building’s foundation by channeling water away from its base. The gutter also helps to reduce erosion, prevents leaks in basements and crawlspaces,protects painted or stained surfaces by reducing exposure to water,and provides a means to collect rainwater for later use. Rain gutters can be made from a variety of materials such as cast iron, lead, zinc, galvanised steel, painted steel, copper, painted aluminium, PVC (and other plastics), concrete, stone, and wood. More information on copper rain gutters is available.