If the lot is flat, the exit point of the drain is a catch basin installed in the room's interior. This basin houses the sump pump, which simply pumps the water out and away from the building. An automatic float switch activates the pump when the water level reaches a predetermined depth in the catch basin. Because it is inside the basement, the pump is readily available and easy to maintain. Many different waterproofing membranes are available from different manufacturers.
Most systems are self- adhering and come in rolls.
The design, specifications and installation of a complete and reliable waterproofing system is critical to the successful use of a basement. Check the qualifications of the person you hire to be sure they meet your expectations. Because of location and site conditions, installing a replacement system is not always possible.