Abstract: A composite ground water drainage system for foundation walls having an elongated drainpipe for placement along the bottom of a foundation wall and a base piece of a sheet of a textured, water impervious material for placement longitudinally along the foundation wall in a substantially vertical position between the foundation and the drainpipe both the drainpipe and the base piece being wrapped in a filter fabric, the fabric including a flap for wrapping around the base piece. A plurality of chimney assemblies are spaced along the base piece extending substantially upwardly and perpendicularly thereto, each chimney assembly also including a sheet of textured material and filter fabric wrapped around the textured material. To create a composite drainage and gas venting system, a vent may be added to one or more of the chimney assemblies, the vent extending from the top of the chimney assembly above the surface of the soil placed over the drainage system.