We strongly recommend the installation of French drains around the whole of the foundation walls when a water infiltration is evident in many areas. This installation will prevent the accumulation of underground water near the foundations walls by draining it the farthest away from the dwelling. Drains should lead the collected water to a sewer, a ditch or a sump pump. The recommended drain is made from plastic, with a diameter of 4 inches, flexible or rigid with small perforations that allow water to enter the French drain. It is covered with a layer of gravel and a geotextile membrane is added on top of the stone to prevent mud, dirt and residue from seeping inside the drain and causing possible future obstruction.
The life expectancy of French drains is approximately 30 years, depending on the installation methods used. Sooner or later, all buildings may experience drainage problems.