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ExcaFix — French drain
French drain being installed at the base of a Quebec foundation
Diagnosis first • Work explained

French drainsbuilt for Quebec

French drain and foundation crack repair, with a clear diagnosis before any digging. An RBQ-licensed team serving Montreal, the South Shore and the North Shore.

514-894-4552Free quote
Licence displayed
RBQ 5681-8941-01
Before the work
Diagnosis
Method and terms
Scope in writing
Choosing the right approach

The problem you can see.The method that fits it.

Each service has its own role. We start by finding the source, then recommend only the work that is actually needed.

Smooth-wall foundation drain surrounded by clean stone in Quebec
100 mm drain • clean stone

French Drain

French drain installation and repair, with written warranty terms detailed in the quote.

See what's involved
Interior foundation crack repair by injection in Quebec
Controlled injection

Foundation Crack Repair

Interior or exterior epoxy and polyurethane injection, selected for the crack and site conditions.

See what's involved
Quebec jobsite method

Show what will be buried.

A strong quote explains more than “replace the drain.” It identifies the source, wall protection, drain base, clean stone, water discharge and final grading.

  1. Before digging

    Diagnose and locate

    We confirm the moisture source and available drain access. Utility locating is requested before digging, with additional site-specific checks where needed.

  2. Excavation

    Protect the work zone

    Sloping, shoring, barriers and safe distances are adapted to the soil and depth. Spoil and machinery stay back from the edge.

  3. At footing level

    Build a readable drainage layer

    A drain of at least 100 mm sits on a stable base, with at least 150 mm of clean coarse aggregate beside and above it, then discharges to an authorized system.

  4. Before closing

    Document and finish

    Wall protection and connections are checked before backfill. Final grading moves surface water away from the foundation.

Foundation drainage cutawayUnlabelled illustration of a protected foundation wall, footing, drainage membrane, clean stone and perforated drain.
Moisture and efflorescence diagnosis before choosing an intervention.
IllustrationMoisture and efflorescence diagnosis before choosing an intervention.
Compaction and final grading that move water away from the wall.
IllustrationCompaction and final grading that move water away from the wall.
Technical principles consultedFoundation-wall drainage — GCR / RBQTrenches and excavations — CNESST
Free estimate

How much does a French drain cost?

Our calculator gives you a realistic price range in under 30 seconds, based on the size of your home, the depth of the foundation and the soil type. Free, instant, and no personal information required.

  • Installation or repair
  • 2026 Quebec market pricing
  • Detailed cost breakdown
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Estimate preview
Complete installation • typical home (130 linear ft)
$12,000 – $18,000
Perimeter excavation≈ $6,750
Drain + drainage stone≈ $3,750
Waterproofing membrane≈ $2,250
Backfill and restoration≈ $2,250
Customize my estimate
Proof of method

Fewer promises.More you can check.

A homeowner should be able to understand what will be done, what will be buried and what the warranty covers — before signing.

before the quote
Diagnosis
RBQ number displayed
5681-8941-01
scope and conditions
In writing
before the site closes
Documented
Before

The diagnosis drives the quote

We tell infiltration, cracking, membrane and drainage apart before recommending any excavation.

During

The job stays easy to follow

Access, site protection, materials, stages and anything unexpected are explained as the work goes on.

After

What gets buried gets documented

The finish, the drainage and the warranty conditions are written down before the site is closed.

Where we work

French drains across the Greater Montreal area

Residential work on the Island of Montreal, the South Shore, the North Shore and throughout the Montérégie.

Island of Montreal

  • Montréal

South Shore

  • Longueuil
  • Brossard
  • Saint-Hubert
  • Boucherville
  • Greenfield Park
  • Saint-Lambert
  • Saint-Constant
  • Sainte-Catherine

North Shore

  • Laval
  • Terrebonne
  • Repentigny

Montérégie

  • Marieville
  • Richelieu
  • Chambly
  • Carignan
  • Otterburn Park
  • McMasterville
  • Saint-Basile-le-Grand
  • Beloeil
  • Mont-Saint-Hilaire
  • Saint-Jean-sur-Richelieu
  • Saint-Bruno-de-Montarville
  • Sainte-Julie
  • Saint-Philippe
  • La Prairie
  • Saint-Amable
  • Saint-Hyacinthe
  • Candiac
  • Delson
  • Saint-Mathieu
  • Napierville
  • Varennes
  • Saint-Édouard
  • Saint-Michel
  • Saint-Rémi
  • Verchères
  • Saint-Isidore
  • Châteauguay
  • Contrecœur
  • Mercier

Estrie

  • Granby

Lanaudière

  • L'Assomption
  • Mascouche
  • Lavaltrie

Laurentides

  • Rosemère
  • Boisbriand
  • Lorraine
  • Sainte-Thérèse
  • Deux-Montagnes
  • Saint-Eustache
  • Sainte-Marthe-sur-le-Lac
  • Blainville
  • Saint-Jérôme
  • Mirabel

Vaudreuil-Soulanges

  • Beauharnois
  • Notre-Dame-de-l'Île-Perrot
  • Île-Perrot
  • Pincourt
  • Vaudreuil-Dorion
  • Saint-Lazare
  • Salaberry-de-Valleyfield

Not seeing your town? Give us a call and we will confirm whether your address falls inside our service area.

Free quote
Frequently asked questions

Your questions, our answers

Common market ranges are about $10,000 to $25,000 for a new installation and $3,000 to $8,000 for a partial repair. These figures are indicative only: depth, length, soil, access and the actual scope of work can change the price.

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Next step

Understand the problem before digging.

Describe the visible signs and receive initial guidance. The on-site quote then confirms access, method and price.

Personal follow-up after your requestWritten terms based on the workRBQ 5681-8941-01Greater Montreal South and North Shores
Request a quote514-894-4552