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French Drain

A French drain moves unwanted water away from your home before it can push against foundation walls or seep into living spaces. The system uses a shallow trench filled with washed gravel and a perforated pipe. As rain and groundwater work through the soil, they naturally flow toward the gravel, enter the pipe, and discharge to a safe location away from your foundation.

By lowering the water level around your home, the system reduces hydrostatic pressure on basement walls and keeps basements and crawl spaces dry. CNT Foundations is locally owned, backs long-term repairs with a lifetime warranty, and maintains a 24/7 call center to book inspections.

Types of French Drain Systems

French drains can be positioned in different ways depending on where water collects and how it reaches your home. A trained technician will match the system to the source of moisture, not just the symptom.

  • Interior French drain: Installed along the inside perimeter of a basement or crawl space, it captures seepage and routes it to a sump pump that moves water out of the house.
  • Exterior French drain: Installed in the soil outside the foundation, it requires excavation and intercepts water before it reaches the wall.
  • Yard or landscape French drain: Placed in low spots where water lingers after storms, it dries out soggy areas and protects landscaping.

Common Signs That You Need a French Drain

Foundation issues can be worrying, and catching problems early saves money and protects your home. Look for these warning signs.

  • Standing water in the yard: After rain, water sits in patches or forms a shallow pond that doesn’t drain within a day.
  • Basement water seepage: Damp spots, trickles, or water on the floor after storms indicate groundwater is entering your home.
  • Soggy or muddy soil near the foundation: Soft, spongy soil around the perimeter signals poor drainage.
  • Water pooling after rainfall: Puddles that collect near the foundation or reappear in the same low areas after each storm point to drainage issues.
  • Mold or musty smells indoors: Persistent musty odors or visible growth often stem from excess moisture in the basement or crawl space.

Frequently Asked Questions

A French drain makes sense when water lingers on your lot, dampness appears along basement walls, or a crawl space stays humid after rain. A properly designed drain gives water a direct path away from your home and protects the structure.

They go around the exterior perimeter of a foundation, along interior basement or crawl space walls, and in low-lying yard areas that stay wet. The placement depends on where the water is coming from.

Installed with the right depth, slope, and filtration, a French drain works very well. It collects and moves water by gravity, reducing pressure against the foundation.

A professional system built with durable pipe, washed stone, and quality filter fabric lasts for decades.

They work together rather than compete. A French drain moves water away before it builds pressure, while sealers block moisture at the surface. Combined, they address both the water source and the pathways it could take into your home. CNT Foundations solves the root cause and backs the work with a lifetime warranty.