The eaves denote the lower roof edge and represent a fundamental term in roof and building architecture. They form the horizontal conclusion of the roof surface and are typically equipped with a gutter that collects rainwater and channels it into downpipes. The overhang of the eaves beyond the exterior wall protects it from weathering and driving rain. Eave height and roof pitch significantly influence a building's proportions and architectural expression. In historical architectural styles, eaves were often elaborately designed with profiled cornices or decorative corbels. In modern construction, they play a central role in planning water drainage and façade protection.