Box gutters are a type of gutter system that is shaped like a box, with sides and a bottom. They are typically used to collect and channel rainwater from the roof of a building to the ground or to a drainage system. Box gutters are typically installed along the edges of the roof and are used to prevent water from spilling over the sides of the building, causing damage to the structure or surrounding areas. They are an important element of a building's drainage system and help to protect against water damage.