Our Services
Foundation Crack Repair — Foundation Repair Specialists
Protect your home against water infiltration with our crack repair expertise.
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A crack in your foundation may look harmless. In Quebec’s climate, however, it opens the door to water infiltration, humidity, mold, and costly structural damage. At Solution ProFissure, our specialists have been helping homeowners across the Laurentians, Laval, Lanaudière, and Greater Montreal for more than a decade. Foundation crack repair is our core expertise: we diagnose every crack, recommend the right method, and complete repairs backed by a transferable 25-year warranty.
With 30 years of construction experience, 1,300+ satisfied clients, and 350+ projects completed in 2024, our technicians provide a free on-site evaluation, a detailed quote, and premium materials to ensure the durability and longevity of your foundation.
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Causes of Foundation Cracks in Quebec
Foundation cracks are common in Quebec. Understanding their origin helps us choose the right repair method and prevent the same crack from coming back. Below are the six causes we most often see on residential job sites.
No Steel Reinforcement in Residential Foundations
Canadian building codes do not require steel reinforcement in residential foundations. Concrete poured without rebar struggles to resist internal and lateral tensions, which makes it vulnerable to cracking within a home's first years. This is one of the structural quirks that explains why so many Quebec foundations crack prematurely.
Freeze-Thaw Cycles and Stress on Concrete
The Quebec climate subjects concrete to intense freeze-thaw cycles. Water that seeps into hairline cracks freezes, expands, then thaws. Repeated dozens of times each winter, these freeze-thaw movements weaken the concrete and widen existing cracks.
Clay Soil and Ground Movement
Many areas of the Laurentians, Laval, and Lanaudière sit on clay soil. This type of soil contracts during dry periods and swells when saturated with water. These soil movements apply uneven pressure to the footing and walls, leading to settlement and cracking.
Concrete Quality and Improper Mix
Poorly mixed concrete — too low in cement, or poured under bad conditions — ages faster. Surface hairline cracks become through-wall cracks within a few years, especially on foundations that were rushed during construction.
Poorly Compacted Backfill Around the Foundation
The backfill placed around the foundation after pouring needs to be carefully compacted. When backfill is made of unsuitable materials or poorly compacted, it settles over the seasons. The foundation loses its lateral support and cracks appear on the walls.
Hydrostatic Pressure and the Water Table
When water builds up around the foundation, it exerts constant hydrostatic pressure on the concrete walls. A high water table, saturated soil, or a failing drainage system intensify this pressure until cracks and water infiltration appear. The most effective preventive solution remains a properly installed French drain system, which channels water away from the walls.
Protect Your Foundation Today with a Free Quote
An ignored crack always costs more than a repaired one. Contact us for a free evaluation and a transparent quote, valid throughout our service area.
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Active vs. Passive Cracks — How to Tell the Difference
Not all cracks are repaired the same way. Before any work begins, we determine whether a crack is active (still moving) or passive (stabilized). This distinction guides the choice of method and the warranty coverage. To dig deeper into the topic, see our guide on how to tell if a foundation crack is serious.
Signs of a Structural Crack That Needs Urgent Repair
A structural crack is wide (more than 3 mm), runs through the wall, follows a stair-step pattern, or comes with visible movement. It can signal settlement, a piering issue, or a loss of structural integrity. Watch for these indicators:
- a crack that widens month after month
- recurring water infiltration during heavy rain
- doors or windows that no longer close properly
- efflorescence (white powdery deposits) at the base of walls
When these signs are present, prompt action by a foundation expert is essential to prevent more expensive damage.
Shrinkage Cracks and Cold Joints — Non-Structural Cases
A shrinkage crack appears in the first months after the concrete is poured. Thin and stable, it does not threaten the structure but can still let water through. A cold joint, by comparison, is the line where two successive pours meet — often a weak point. Both cases are repaired effectively by injection without major excavation.
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How to Repair a Foundation Crack
Whether the crack is on the inside or outside, we offer customized solutions based on the diagnosis. Our four main methods seal, stabilize, reinforce, and prevent the worsening of the crack, depending on what we find on residential Quebec foundations. For a detailed comparison of available techniques, also see our article on the best method for repairing foundation cracks.
Polyurethane Injection for a Watertight Crack Seal
Our specialists use a high-quality hydrophobic expanding polyurethane to fill cracks and form a watertight barrier. On contact with moisture, the polyurethane expands, conforms to the irregular contours of the crack, and blocks any infiltration. Polyurethane injection, paired with our hydrophobic liquid and drainage membranes, seals the crack durably. The technique can be applied even when water is present and works year-round in any season.
Epoxy Injection for Stable Structural Cracks
Epoxy injection is suited to stable structural cracks where the goal is to restore the concrete’s mechanical strength. The epoxy resin bonds the crack from one side to the other like a permanent adhesive. Once cured, it gives the wall back its original load-bearing capacity.
The choice between epoxy and polyurethane depends on the diagnosis. Our team assesses crack mobility, water presence, and wall thickness before recommending the optimal method. In some cases, the two techniques can even be combined.
Steel Plates and Structural Reinforcement
For active structural cracks, we install steel plates that stabilize the structure and reinforce the walls by limiting ground movement. This intervention — done from the outside or the inside — significantly reduces the risk of new cracks forming. In more severe cases, we move toward a complete foundation repair, which can include rejointing, carbon fiber reinforcement, or partial replacement of the foundation.
Exterior Waterproofing with Membrane and Excavation
When the crack runs through the foundation wall and exterior access is possible, we proceed with a mini-excavation to treat the crack at its source. The wall is cleaned, the crack is sealed, then a membrane is applied on the outside to permanently block water. Depending on the situation, we use a Delta-MS membrane, asphalt coating, liquid rubber membrane, or an elastomeric membrane. For full protection across the entire wall, see our complete foundation waterproofing service.
Request Your Free Quote for Foundation Crack Repair
Free quote, detailed estimate, no obligation. Our team will call you back within 24 hours to schedule the evaluation of your crack and recommend the right solution for your home.
Request my free quoteMore than 1,300 Quebec homeowners have already trusted us to protect their foundation.
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Why Choose Solution ProFissure for Your Foundation Cracks
Choosing the right company for foundation crack repair means choosing peace of mind for the next 25 years. Here’s what sets us apart in Quebec’s foundation repair market. To learn more about our team of foundation experts, our values, and our family-run history, visit our About page.
30 Years of Foundation Expertise and 1,300+ Satisfied Clients
Solution ProFissure is a family-owned business founded by a professional with more than 30 years of construction experience and over a decade dedicated specifically to foundations. This combined expertise lets us see the foundation as a complete system, not just a surface to be patched.
The numbers speak for themselves:
- 1,300+ satisfied clients since the company was founded
- 350+ projects completed in 2024 alone
- 30+ years of combined experience in construction and foundations
- RBQ : 5770-6285-01, an active license from the Régie du bâtiment du Québec
Transferable 25-Year Warranty on Foundation Crack Repair
Most contractors offer a 10-year warranty. We offer 25 years, transferable to the next owner if the home is sold. This warranty protects the property’s value, prevents unwelcome surprises, and reflects our confidence in the durable solution we apply. Concretely: if a crack we repaired develops a problem within 25 years of the work, we come back on site at no charge.
Free Estimate Within 24 Hours and 7-Day Service
A leaking crack cannot wait until next week. Our team responds to every request within 24 hours and schedules the free evaluation quickly. To assess each case correctly, a technician comes on site. In an emergency, we work 7 days a week including weekends, with 24/7 availability on call. Our commitment: transparency on costs, respect for deadlines, and clear communication at every step.
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Our Foundation Crack and Foundation Repair Projects
Every project reflects our commitment to excellence and attention to detail. Our full services gallery shows the range of work we carry out, from simple injection to complete foundation rebuilds. Below, you’ll find a few of our recent foundation crack repair projects.
Each documented project becomes a reference for homeowners hesitating to take action.
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Areas We Serve for Foundation Crack Repair
Our team travels throughout the northern crown of Greater Montreal, from the Laurentians down to Lanaudière, with a deep understanding of the soil and climate of each area.
Laurentians — Saint-Jérôme, Mirabel, Sainte-Adèle, Saint-Sauveur
In the Laurentians, we regularly work in Saint-Jérôme, Sainte-Sophie, Saint-Calixte, Saint-Colomban, Saint-Sauveur, Mirabel, Sainte-Adèle, Oka, and Lachute.
Laval, Lanaudière, and Montreal's North Shore
We also serve Laval, Saint-Eustache, Rosemère, Sainte-Marthe-sur-le-Lac, as well as Terrebonne and Mascouche in Lanaudière. Our head office is at 117 rue des Pruches in Sainte-Sophie, which lets us efficiently cover Montreal and the entire north shore.
Book Your Free Evaluation with a Foundation Expert
No fees, no obligation, anywhere in our service area. A foundation expert comes to your home, examines the crack, and proposes the best solution.
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Frequently Asked Questions About Foundation Crack Repair
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How much does foundation crack repair cost in Quebec?
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In Quebec, the cost of foundation crack repair generally ranges from $400 to $2,000 depending on length, depth, accessibility, and the method chosen. A simple polyurethane injection usually costs less than an exterior intervention with excavation. When a heavier structural problem is diagnosed, the cost can rise. Our free quote gives you an exact price for your situation, with no surprises on the final invoice.
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How long does a polyurethane injection repair last?
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A properly executed polyurethane injection typically lasts 15 to 25 years. Our transferable 25-year warranty covers that entire period. Durability depends on product quality, surface preparation, and respecting the injection steps — which is why we work exclusively with premium-grade materials.
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Can you repair a foundation crack yourself?
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For purely cosmetic hairline cracks, an off-the-shelf sealant or crack filler from a hardware store may temporarily do the job. See our guide on how to seal a crack in concrete for the details. As soon as there's water infiltration, a through-wall crack, an active foundation crack, or a humid basement, however, a professional intervention is needed to diagnose the situation properly and guarantee the seal and longevity of the repair.
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What's the difference between epoxy and polyurethane?
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Epoxy is rigid and bonds the crack permanently — ideal for stable cracks where the goal is to restore the concrete's strength. Polyurethane is flexible, expands on contact with water, and adapts to minor movements — ideal for active cracks or where moisture is present. Our expert determines the optimal method during the free evaluation.
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When should you worry about a foundation crack?
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A crack becomes a concern when it widens, lets water through, follows a stair-step pattern on block walls, or appears alongside cracks on interior walls. For a complete guide, see our article on when to worry about cracks in your foundation. At the slightest doubt, a free visual inspection by our team will give you a clear answer.
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Can foundation crack repair be done in winter?
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Yes — interior injection can be carried out year-round, winter included. Polyurethane and epoxy can be applied in cold conditions provided the indoor environment is heated. For exterior work that requires excavation, we usually wait for the soil to thaw in spring. If you have water infiltration in a basement wall in the middle of winter, we step in on an emergency basis from the inside.