Foundation Crack Injection Cost in Toronto & Southern Ontario (2026)
Most poured‑concrete foundation crack injections in our service area cost $600–$1500 per crack, depending on crack length, accessibility, and whether epoxy (structural bonding) or polyurethane (leak‑stopping) is used. Tie‑rod hole sealing is typically $75–$150 per hole.
Use the calculator below for a rough estimate, then compare the pricing guide below for typical crack sealing costs in Toronto, the GTA, and surrounding Southern Ontario communities (within ~300 km of Toronto).
Pricing notes: Final pricing is confirmed after inspection or reviewing pictures. HST and finishing work (drywall removal/repair, insulation, repainting) are not included unless quoted.
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Typical Foundation Crack Repair Costs (2026)
Polyurethane Crack Injection
• Typical cost range: $600–$1,000 per crack
• Best for: Stopping active leaks with a flexible seal that can tolerate normal seasonal movement.
Epoxy Crack Injection
• Typical cost range: $600–$1,500 per crack
• Best for: Bonding “structural” cracks in poured concrete where strength restoration is the goal.
Tie‑Rod Hole (Rod Hole) Sealing
• Typical cost range: $75–$150 per hole
• Best for: Sealing circular leaks caused by original formwork tie‑rod holes in poured foundation walls.
Multi‑Crack Packages
• Typical cost range: Varies (volume discounts)
• Best for: Best value if you have 3+ cracks in an unfinished basement.
What “per crack” usually means: Typical pricing assumes an accessible poured‑concrete crack (often up to ~6–8 ft). Longer cracks, hidden cracks, or finished basements may increase labor and prep time.
| Feature | Polyurethane Injection (The Sealer) | Epoxy Injection (The Welder) |
|---|---|---|
| Best For... | Stopping active water leaks and handling flexible movement. | Restoring structural strength to the foundation. |
| How it Works | Expands 20x to fill every void and seal water out. | Hardens like concrete to bond the wall back together. |
| Flexibility | High (Moves with the house during freeze/thaw cycles). | Low (Rigid and super strong). |
| Typical Use | 90% of residential basement leaks. | Structural cracks caused by settlement. |
Want the deep technical breakdown? Read our full guide on [Epoxy vs. Polyurethane Science].
Is My Crack Dangerous?
Non-Structural (Leaking): Vertical cracks, hairline cracks, cracks from window corners. (Solution: Polyurethane).
Structural (Dangerous): Horizontal cracks, stair-step cracks in block walls, cracks wider than a dime (1/4 inch). (Solution: Epoxy or Underpinning).
What’s Included (and Not Included) in a Standard Injection
Included in a standard injection
• Confirm the crack path and suitability for injection (poured concrete)
• Surface prep and controlled injection (method depends on epoxy vs polyurethane)
• Patch and basic cleanup after injection
• Recommendations if there are signs of movement or broader water entry pathways
Not included unless quoted
• Drywall removal/repair, insulation removal, painting, or finished-basement restoration
• Mold remediation
• Engineering reports (when required)
Which Injection Do You Need?
The best method depends on whether your goal is to stop water or restore strength.
Polyurethane Injection (Leak-Stopping / Flexible)
How it works: Polyurethane resin is injected into the crack and reacts with moisture. It expands 30 times its volume to fill voids and help seal the crack path.
When it’s used: Often selected for active leaks because it remains flexible and can tolerate normal seasonal expansion and contraction.
Epoxy Injection (Structural Bonding)
How it works: Epoxy cures into a rigid, high‑strength bond that adheres the two sides of a poured‑concrete crack together.
When it’s used: Typically used when structural bonding is the main goal and site conditions support epoxy injection.
Tie‑Rod Hole Sealing (Rod Hole Repair)
What it is: Some “leaks” are not jagged cracks but small circular holes left from original concrete formwork tie‑rods.
The fix: We locate the rod hole and seal it using an injection/sealant method appropriate to the leak path.
What Affects the Price Per Crack?
• Accessibility: Exposed concrete is faster. Finished basements often require careful access work before injection.
• Crack length and condition: Longer or branching cracks may require more ports/material and time.
• Active leaking vs. dry crack: Active water can require additional prep and controlled injection steps.
• Previous patch attempts: Old hydraulic cement, silicone, or coatings may need removal for proper bonding.
• Scheduling: Urgent or after‑hours requests (if offered) can change pricing.
When Crack Injection Is NOT the Right Fix
Injection is best for solid poured concrete. It may not be suitable if:
• The foundation is concrete block (cinder block) (hollow cores make injection unreliable)
• There is significant bowing/rotation or clear structural movement
• Water entry is widespread and not limited to a crack/rod hole pathway
If we find these conditions, we’ll explain the safest next step before any work begins.
Frequently Asked Questions about Crack Injection
How much does foundation crack injection cost in Toronto?
In 2026, foundation crack repair typically ranges from $600 to $1,500 per crack. Polyurethane injection (for waterproofing) is generally lower cost, while Epoxy injection (for structural strength) is higher. Volume discounts often apply for multiple cracks.
What is the difference between Epoxy and Polyurethane injection?
Polyurethane is a flexible foam designed to stop water leaks by expanding to fill voids. Epoxy is a rigid adhesive designed to restore structural strength by ‘welding’ the concrete back together.
Can you fix a crack in a cinder block foundation?
High-pressure injection is generally not effective for cinder block (hollow) foundations. These usually require exterior waterproofing or interior weeping tiles because the hollow blocks cannot contain the injection material.
How long does a crack injection take?
Most standard poured‑concrete cracks can be injected in about 1–2 hours, depending on prep work and accessibility.
Will crack injection hold up during winter?
Quality injection systems are designed to perform through freeze‑thaw cycles. Longevity depends on crack condition, movement, and correct product selection.
Can you inject cracks in block foundations?
Typically, no. Injection is intended for solid poured concrete. Block foundations often require a different approach.
Does an actively leaking crack cost more?
Sometimes. Active leaks can require additional prep and controlled injection steps to ensure the resin seals properly.
Do you offer discounts for multiple cracks?
Yes. Multi‑crack packages may reduce the average cost per crack when multiple repairs are completed in one visit.
Is the calculator price a final quote?
No. The calculator is a rough estimate. A final price is confirmed after inspection because accessibility and crack condition can change the scope.
Serving Toronto, the GTA & Southern Ontario
We service Toronto, the GTA, and surrounding Southern Ontario communities (within ~300 km of Toronto). For an exact quote, book an inspection and we’ll confirm the right injection method and the full scope.
Last updated: January 2026
Call: 416-361-3323
Address: 60 Millwick Drive, Toronto, ON M9L 1Y3
