If you live in an area that is prone to flooding, a deep french drain may be necessary. The purpose of this type of drainage system is to keep your foundation dry and safe from water damage.
French drains are installed on lower areas of the land where the water tends to collect after light or heavy rain. This help to redirect ground water around the house in order to avoid higher levels on moisture on the soil and prevent foundation problems.
The installation process consists of digging a trench, insert a perforated pipe with basins approximately every 10 feet and fill the trench back.