The primary function of a rain gutter is to direct water from the roof of a home to the ground in such a way that it does not damage the building or lawn. This has several specific purposes.
Unchecked, rain washing off of a roof will run down the outer walls of a building, which may rot wooden houses. Rain gutters help to prevent rot.
By diverting water away from the foundations of homes, rain gutters can help to prevent basements from flooding.
Uncontrolled runoff from roofs can contribute to unsightly soil erosion on lawns and around the home. Gutters help homeowners to control the flow of water from the roof of their home.
Rain gutters help homeowners save money by preventing flooding, soil erosion and rot and by protecting the paint or stain on their homes.