French Drain
Protect Your Foundation Before It's Too Late
Groupe Lavoie Signature offers French drain installation and repair services in Terrebonne, Mascouche, and on the North Shore. Our team handles the excavation, installation of the drainage system, and backfilling for lasting protection of your foundation.
Water in your basement won't go away on its own. Have your French drain inspected.
Signs Your French Drain Needs to Be Replaced
A French drain has a limited lifespan, generally between 25 and 40 years. Over time, pipes become clogged, crack, or collapse under soil pressure. Several signs indicate that an intervention is needed:
- Persistent moisture or standing water in the basement
- Mould odours with no apparent source
- Cracks in foundation walls
- Efflorescence (white chalky deposits) on concrete
Ignoring Your French Drain Costs More Than Replacing It
A failing French drain does not repair itself. Water accumulating around the foundation exerts hydrostatic pressure that accelerates the deterioration of the concrete. Mould takes hold in the walls and floors, affecting air quality.

The value of your property decreases and the necessary repairs increase with every freeze-thaw cycle.
From Excavation to Backfilling: A Complete Intervention
Our team handles the entire project, from the initial assessment to the final backfilling:
Step 1
Inspection and diagnosis of the current state of the drainage system
Step 2
Perimeter excavation around the foundation
Step 3
Removal of the old drain and cleaning of the footing
Step 4
Installation of the new drain, membrane, and crushed stone
Step 5
Backfilling and restoration of the grounds
A Dry Basement A Protected Property
A properly installed new French drain protects your foundation for the next 25 to 40 years. Moisture disappears, air quality improves, and the value of your property is preserved. Our work is guaranteed.
The longer you wait, the more water works against your foundation. Have your French drain inspected.
