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Professional crack injection and repair services to seal foundation cracks and prevent water intrusion.
Foundation crack repair is the process of sealing cracks in your basement's concrete walls or floor to stop water intrusion and prevent further structural deterioration. In Toronto, foundation cracks are extremely common — the cycle of freezing and thawing that the GTA experiences from November through April puts repeated stress on concrete, causing hairline cracks to widen over time. Left unrepaired, a crack that starts at 1/16 of an inch can grow to half an inch within a few years as water freezes inside it and expands.
Not all cracks are equal. Vertical cracks typically result from concrete shrinkage during the original pour and are the most common type we see in Toronto homes. Horizontal cracks are more serious — they indicate lateral pressure from soil pushing against the wall, which is especially prevalent in homes built on the heavy clay soils found throughout Scarborough, North York, and Mississauga.
Why Choose Us
The repair method depends on the crack type, width, and whether the crack is actively leaking. For non-structural cracks that are simply leaking water, polyurethane injection is the standard solution. The flexible polyurethane foam expands inside the crack, filling every void from front to back. It remains flexible after curing, which is critical in Toronto where freeze-thaw movement continues to shift foundations seasonally — a rigid repair would simply crack again alongside the original fracture.
For structural cracks — those wider than 1/4 inch, horizontal, or showing signs of wall displacement — we use epoxy injection combined with carbon fibre reinforcement straps. Epoxy creates a bond stronger than the original concrete, effectively welding the crack closed. Carbon fibre straps prevent future movement. This combined approach has a permanent success rate exceeding 98% in our experience across thousands of GTA repairs.
Don't Ignore the Signs
Our crack repair process is minimally invasive and typically completed in a single day. We begin by cleaning the crack surface and installing injection ports at regular intervals along its length. For polyurethane repairs, we inject the material from the bottom up under controlled pressure, watching for the foam to appear at each successive port — confirming complete penetration through the wall's full 8-10 inch thickness. The ports are removed and patched after the material cures.
For epoxy structural repairs, we first seal the crack surface with a fast-setting paste, then inject low-viscosity epoxy through the ports under pressure. Once cured, we install carbon fibre straps across the crack at 12-inch intervals using structural adhesive. The entire repair is then covered with a cementitious coating that can be painted to match your basement walls.
Foundation crack repair is the most affordable entry point into basement waterproofing, with most single-crack repairs costing $400-$1,500. However, it's important to understand what crack repair can and cannot do. It permanently seals the specific crack being treated, but it does not address water that enters through the cove joint, floor cracks, or porous concrete. If your basement has multiple water entry points, a full interior waterproofing system may be more cost-effective than repairing each crack individually.
Every crack repair we perform comes with a written lifetime warranty against re-leaking through the repaired crack. If the crack reopens or leaks again at any point, we return and repair it at no charge. We also document each repair with before-and-after photos and a detailed report that you can share with your insurance company or provide to future buyers during a home sale.
Materials & Methods
Flexible expanding foam injected into non-structural cracks. Remains flexible after curing to accommodate Toronto's freeze-thaw foundation movement without re-cracking.
High-strength structural adhesive that bonds cracked concrete back together with a joint stronger than the original material. Used for structural cracks requiring rigidity.
High-tensile carbon fibre straps bonded across structural cracks to prevent future wall movement. Provides permanent stabilization without invasive steel beam installation.
Fast-setting cement applied to larger voids, honeycombing, and surface defects as a preliminary step before injection or as a standalone repair for non-leaking surface cracks.
Our Process
We inspect the crack type, width, length, and location to determine whether it's structural or non-structural and select the appropriate repair method.
The crack surface is cleaned and injection ports are installed at regular intervals along the crack length.
Polyurethane or epoxy is injected under controlled pressure from bottom to top, filling the crack through the full wall thickness.
For structural cracks, carbon fibre straps are bonded across the crack with structural adhesive to prevent future movement.
Ports are removed, the surface is patched and coated, and we provide before-and-after photos with your warranty certificate.
Client Reviews
“Outstanding job! My basement is finally dry thanks to your team. No more musty smell or moisture problems. A+ service!”
“From the initial appointment to final inspection, service was exceptional. Prompt, professional, and results exceeded expectations.”
“Professional and friendly staff. They solved our leaky basement in no time. The results were fantastic. Basement has been leak-free since the work was done.”
Experience & Expertise
Related Solutions
Permanent foundation crack repair using high-strength epoxy injection for structural stability.
Learn More →Complete interior drainage systems, sealants, and sump pumps to manage water that's already entering your basement.
Learn More →Complete foundation protection systems combining interior and exterior waterproofing methods.
Learn More →Service Areas
We provide foundation crack repair throughout Toronto and the Greater Toronto Area.
Common Questions
