Just found a crack in your basement wall? Most are sealed from the inside in one visit — polyurethane for leaks, epoxy for structure, no digging.
Basement crack injection seals cracks in poured-concrete basement walls from the inside, in a single visit, without excavation. Leaking cracks are injected with expanding polyurethane that cures in water; structural cracks with bonding epoxy. Most Toronto-area basement cracks are repaired in one to two hours and covered by a transferable warranty.
Pricing reviewed regularly
Almost every poured-concrete foundation in the GTA cracks — concrete shrinks as it cures, and Toronto’s clay soils and freeze–thaw winters keep working the wall for decades afterward. A crack is not automatically a crisis. What matters is which kind you have.
If you are unsure, photograph the crack next to a coin for scale and call — we will tell you over the phone whether it sounds urgent.
| What you see | What it usually means | Urgency |
|---|---|---|
| Vertical or slightly diagonal, hairline–3 mm | Curing shrinkage or minor settlement | Low — but seal it before it leaks |
| Vertical crack, wet or leaking after rain | Shrinkage crack that has become a water path | This week — water damage compounds |
| White powdery deposits (efflorescence) | Water is moving through it, even without visible drips | Medium — moisture is already inside the wall |
| Wider than 3 mm, or growing year over year | Movement — needs diagnosis before repair | High — assessment first |
| Horizontal crack, or wall bowing inward | Soil pressure overloading the wall | Immediate structural assessment |
| Stair-step cracks in block walls | Differential settlement | High — and block walls cannot be injected |
Leaking or damp cracks → polyurethane injection. Expanding, water-activated foam fills the crack full-depth and every hairline branch, stays flexible, and works even mid-leak.
Structural cracks → epoxy injection. Once assessed as stable and dry, structural epoxy bonds the wall back to monolithic strength.
What injection is not: hydraulic cement, caulk, or paint-on sealants. Surface patches fail on Toronto’s moving walls within seasons — much of our work replacing them was somebody’s cheap fix two years ago.
Fit check: injection is for poured concrete walls. Block, brick, or stone foundation? The right fix is different — see basement leak repair — and we will tell you which wall type you have at the assessment.
Diagnosis, wall-type check, written quote on the spot.
In finished basements, the smallest drywall opening that exposes the crack.
Ports set, crack sealed and injected bottom-up to full depth.
Paintable surface same day; cleanup complete.
Transferable certificate for your records and any future sale.
The proof behind every basement crack we seal.
Backed by the DryShield family — a quarter-century of GTA basements kept dry.
Injection repairs warrantied for life — and the warranty moves with the house when you sell.
Full commercial coverage on every job, every crew, every home.
Eligible contractor for City of Toronto, Peel & Halton basement-flooding subsidy programs.
Inspection, honest diagnosis, and an exact per-crack quote — free, no pressure.
Your price is confirmed in writing before any work starts — no hourly surprises.
The GTA’s expansive clay swells against basement walls every wet season and pulls away in drought; Lake Ontario weather systems deliver freeze–thaw cycling well into April; and much of the housing stock’s poured foundations date from eras with faster pours and fewer control joints. The result: vertical shrinkage cracks are near-universal in GTA basements — and after a major storm, injection crews book out fast. Sealing a dry crack now costs less than drying a flooded rec room later.
Pricing is per crack — see real ranges on the cost page. Additional cracks on the same visit cost less each. Not sure it is a crack at all? Start at basement leak repair, or read the full crack injection guide.
Photograph it, call (800) 371-5302, and we will tell you how urgent it sounds before you book anything. Written quote on-site · one-visit repair · transferable warranty.
The basement crack repair cost ranges based on the type of method and materials used. Sometimes it may be less or more, depending on the severity of the fissures. There are two ways to fix these fissures. The first method uses crack injections and then waterproofing. The cranny is injected with epoxy or urethane to prevent water from leaking. ConcreteCrackRepair.ca can fix and waterproof the fissure on the exterior of the basement without removing the drywall or the insulation. Our estimation and inspection to mend the damages are reasonable, cost-effective, and suit your budget. Our seasoned professionals will carefully inspect how your house deals with water leakage problems, find the root cause of the fissures and fix them at the most competitive prices. If your home needs a professional reconstruction, you need to give it a new look, and you want affordable service, contact us today!
Basement crack repair isn’t just another household chore—it’s a smart move to stop water damage, protect structural integrity, and keep property values climbing across Canada’s wet seasons. Curious how we tackle every crack with precision? Check out our step-by-step process below to see exactly how we get the job done right.
We examine basement walls, floors, windows, and doors, mapping hairline cracks, wide cracks, and horizontal cracks. Moisture meters and flashlights reveal hidden basement leaks, loose concrete, and early signs of structural problems.
Our technicians wire-brush debris and dust, vacuum concrete surfaces, and bevel small cracks for better bonding. Clean substrates ensure that concrete crack filler, hydraulic cement, or epoxy adheres to the foundation wall.
Injection ports are glued with crack sealer along the full crack length. Proper spacing lets low-pressure epoxy injection travel deep, fill voids, and seal basement leaks without damaging finished areas.
A quick-cure surface epoxy forms a gasket that contains injection pressure. This barrier stops resin from escaping, protects adjacent concrete walls, and prevents radon gas and water from re-entering the crack.
We inject expanding resin from the bottom to the top using a professional caulking gun. The epoxy fills, bonds, and restores structural integrity, creating a long-lasting repair inside concrete structures and foundations.
Carbon-fibre staples or straps lock both sides together for structural cracks. Combined with epoxy, this upgrade resists soil pressure, prevents more cracks, and strengthens the basement foundation for decades.
Ports are clipped off, and hydraulic mortar feathers the edges for a smooth surface. We tint the patch so the repaired concrete matches the surrounding wall, leaving no rough spots to catch dust or moisture.
After curing, we pressure-spray water to verify a perfect seal. Technicians re-inspect adjacent areas, ensuring no new wall cracks, basement leaks, or surface bulges threaten future structural integrity.
Worksite is swept, vacuumed, and debris removed. Homeowners receive photos, maintenance tips, and a transferable warranty covering each injected crack, crack repair kit materials, and labour across Canadian climates.
