How interior systems work
Interior systems commonly combine perimeter drainage, wall or joint water management, and a sump basin or pump. The goal is to collect water before it spreads across the basement floor and discharge it safely away.
When interior drainage is considered
Recurring water at the wall-floor joint, seepage during heavy rain, and groundwater pressure can all lead homeowners to consider an interior system. See water coming through the basement floor and hydrostatic pressure for more context.
French drains and sump pumps
Interior drainage often works together with a French drain and sump pump. These components serve different roles and are frequently complementary rather than interchangeable.