Surface Drainage System
A surface drainage system typically includes 9 inch by 9 inch or 12 by 12 inch area drains and 4 inch flexible PVC pipe. The system is used to collect water at ground level and channel it away from the home. If there is not enough natural grade to allow the water to gravity drain away, it may be necessary to install a sump and a pump system. Please click here for terms regarding this type of repair.
Why would I need a surface drainage system?
All homes require proper drainage. Homes that have poor drainage can heave. (i.e. if water ponds within 4 feet or so of the foundation after watering or rain) This heaving of the foundation causes stress to both the foundation and structure.
A French drainage system is a trench covered with gravel or rock that redirects surface and/or groundwater away from an area. A French drain has perforated hollow pipe along the bottom to capture water that seeps down through the upper gravel or rock. French drains are common drainage systems, primarily used to prevent ground water from migrating under the foundation. Ground water under a foundation can cause movement beyond seasonal norms. French drains are also used behind retaining walls to relieve hydrostatic pressure.
Why would I need a French drain?
A French drain is most commonly used to collect and channel ground water to keep it from going under the home. Ground water that travels under a slab foundation can cause a foundation to go up and down repeatedly which can cause foundation problems.