Definition
This gravel-filled trench with drainage pipe directs groundwater away from foundations. It's a passive system requiring no power and periodic maintenance.
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Find my pathAbout this term
French drains collect groundwater and direct flow away from structures. Cost is $1,500-4,000 depending on length and excavation difficulty. Passive system requiring no power. Effective for slope sites directing water downhill. Requires periodic flushing to prevent clogging. Critical component of comprehensive drainage. Works with gutters and grading to manage water. Reduces basement moisture and foundation stress. Regular inspection ensures continued effectiveness.
Pro Tip
Verify French drains function by inspection and testing during rain.
Example
A French drain redirected groundwater away from the foundation preventing basement seepage.