Interior drainage systems

It manages water that reaches the wall and floor rather than keeping it out entirely, directing it to the sump before it spreads across the floor.

Many homes take one to three days depending on size and obstacles.

A perforated pipe set in gravel along the inside perimeter of the floor collects water at the floor-wall joint and carries it to a sump pump that discharges outside.

The length of wall to be drained, floor thickness, number of sump pumps, access around stairs and mechanicals, and whether finishes must be removed.

Cutting concrete creates dust and debris, but contractors use dust control and remove debris. Basements are typically usable again within a few days.

Not always. If water enters only along one or two walls, drainage may be installed only there, though full perimeter systems are common where groundwater is high.

Mostly sump pump maintenance: test it before wet seasons, clean the pit occasionally and replace the pump as it ages.

Yes, but the lower part of finished walls along the drain path usually must be removed and replaced.

Interior drainage is less disruptive and handles groundwater well; exterior work stops water at the wall surface and suits homes with good access or wall damage.