Foundation Drainage
The foundation is a vulnerable place for water intrusion. Improper drainage around the foundation is a major cause of leaking foundations. When a drainage system is used in residential construction, it is usually a combination of a gravel drainage layer with a foundation drain, either drain tile or perforated PVC pipe.
Prefabricated Foundation Drainage Panels
Engineered, prefabricated foundation drainage panels are designed to facilitate the movement of ground water to reduce the water pressure stress on the foundation waterproofing. The drainage panels provide an unobstructed path from surface grade to footing, allowing the footing drain to collect and move water away from around the foundation. Some of these systems also provide thermal resistance and can reduce interior condensation.
Foundation drainage panel systems combine with waterproofing membranes to provide protection from ground water in areas where there is high water. Regardless of the type of drainage panel used, washed gravel is always necessary.
-- Tips courtesy of HomeAdvisor.com