# Concrete Foundation Repair Toronto | Best Concrete > Foundation crack repair, waterproofing, structural stitching and wall stabilization in Toronto from $300 to $2,500 per crack. WSIB insured, 2-year workmanship warranty. URL: https://bestconcretetoronto.ca/concrete-foundation-repair/ ![Excavated foundation wall with dimple membrane and weeping tile at the footing](/images/hero/excavated-foundation-wall-with-a-black-dimple-memb.webp) # Foundation Crack Repair & Basement Waterproofing in the GTA Last updated: August 28, 2026 Foundation crack repair, waterproofing, structural stitching and wall stabilization. - verified 2-Year Workmanship Warranty - shield WSIB + $2M Liability - schedule 2-Hour Quote Window - star 4.9 Google Rating Published pricing $300 - $2500 per crack (varies with severity) request\_quote Get a Free Quote [/contact/ →](/contact/) call (647) 800-3688 [tel:+16478003688 →](tel:+16478003688) View Pricing [#pricing →](#pricing) - star 4.9 Star Google Rating - receipt\_long Published Pricing - verified 2-Year Workmanship Warranty - shield WSIB + $2M Liability - schedule 2-Hour Response Window - support\_agent 24/7 Phone ![Technician injecting polyurethane into a leaking foundation wall crack from inside a basement](/images/misc/technician-injecting-hydrophobic-polyurethane-into.webp) Technician injecting polyurethane into a leaking foundation wall crack from inside a basement ## What Is Concrete Foundation Repair? Foundation repair covers four related jobs: sealing cracks so water stops coming through, stabilising walls that are moving, restoring concrete that road salt has eaten away above grade, and managing the water outside that caused most of it in the first place. Which of those you need depends entirely on diagnosis, and diagnosis is where this trade earns or loses its reputation. A leaking crack can be sealed from inside in a few hours for a few hundred dollars. The same leak, if the real problem is a blocked weeping tile and hydrostatic pressure against the whole wall, will come back somewhere else next spring. So before quoting we look outside as well as inside: grading, downspout discharge, window wells and the general water path around the house. Interior work uses hydrophobic polyurethane injected through surface-mounted ports. It reacts with the water already in the crack and expands to fill the full wall thickness. For dry structural cracks we use epoxy instead, which bonds the concrete back into one piece. Where a crack is still moving, carbon-fibre stitching bonded across it stops the movement, which is the only way any filler survives long term. Exterior work means excavating to footing depth, cleaning the wall, sealing it, installing a Delta-MS style dimple membrane, inspecting and tying in the weeping tile, then backfilling and restoring grade. It is expensive and disruptive, and we recommend it when it is genuinely warranted rather than as a default. ### What’s Included - Interior and exterior water-path diagnosis - Crack mapping and movement assessment - Hydrophobic polyurethane or epoxy injection - Carbon-fibre stitching on moving cracks and bowing walls - Polymer-modified parging on spalled above-grade walls - Excavation to footing depth where exterior work is needed - Dimple membrane installation and drainage tie-in - Weeping tile inspection, flushing or replacement - Backfill, grading and site restoration ## Common Problems We Solve ### Water on the Basement Floor After Heavy Rain Almost always traceable to a specific crack or a specific entry point. Injection seals it. We also check the outside, because a downspout discharging against the wall will overwhelm any repair eventually. ### Horizontal Cracks and Bowing Walls More serious than vertical cracks, and usually caused by lateral soil pressure, often made worse by clay expansion and frost. Carbon-fibre stitching resists further movement without steel beams intruding into the room. Severe cases need engineered intervention, and we say so. ### Spalling Above-Grade Foundation Walls The exposed strip of foundation between the grade and the siding takes direct road salt every winter. It flakes, then crumbles, then exposes aggregate. Polymer-modified parging restores it and protects what is behind. ### Efflorescence and Damp Walls The white powdery deposit on a basement wall is free lime carried out by moisture moving through the concrete. It is a symptom of water movement, not a defect in itself, and it tells us where to look. ## How Much Does Foundation Repair Cost in Toronto? Foundation work is priced per crack at $300 to $2,500, with severity driving the range. Cost drivers: - **Interior versus exterior.** Excavation multiplies the cost of any repair. - **Depth and access.** Deep foundations, tight side yards and landscaping all add to excavation cost. - **Structural work.** Carbon-fibre stitching adds material and labour. - **Drainage.** Weeping tile replacement and drainage connections are separate items. - **Above-grade restoration.** Parging is priced by area. - **Number of cracks.** Several treated in one visit costs less per crack. ## Interior or Exterior Repair? Choose **interior injection** when there is one clearly identified leaking crack, when the wall is otherwise sound, and when exterior water management is basically adequate. It is faster, cheaper and far less disruptive, and it is quoted as concrete crack repair [/concrete-crack-repair/ →](/concrete-crack-repair/) at the per-crack rate. Choose **exterior excavation and membrane** when there are multiple failure points along a wall, when the weeping tile is blocked or absent, when the exterior face of the wall is deteriorating, when the water table or drainage is genuinely the problem, or when interior repair has already been tried and the water came back. Anyone who quotes the same solution for every basement is not diagnosing. We will give you the interior option when it will work, and we will tell you plainly when it will not. Foundation work rarely arrives alone. Once the wall is sound we re-seal the exterior face under concrete sealing and waterproofing [/concrete-sealing-waterproofing/ →](/concrete-sealing-waterproofing/) , raise any slab that dropped while the soil was moving with concrete lifting and levelling [/concrete-lifting-levelling/ →](/concrete-lifting-levelling/) , and rebuild the porch and front steps [/concrete-porches-front-steps/ →](/concrete-porches-front-steps/) where excavation has disturbed them. Where the grade itself is the problem, a poured concrete retaining wall [/concrete-retaining-walls/ →](/concrete-retaining-walls/) holds it back permanently. Send photos of the crack from inside and of the grading and downspouts outside, and we will come back with a written published-rate quote inside two hours. Published pricing ## How Much Does Foundation Repair Cost in Toronto? $300 - $2500 per crack (varies with severity) ### Interior Crack Injection $300 - $700 per crack - check Surface seal and injection ports - check Hydrophobic polyurethane for active leaks - check Epoxy for dry structural cracks - check Ports removed and wall patched Get a Free Quote [/contact/ →](/contact/) Most requested ### Injection & Stitching $700 - $1,400 per crack - check Everything in interior injection - check Carbon-fibre stitching across moving cracks - check Above-grade parging where spalled - check Movement monitoring advice Get a Free Quote [/contact/ →](/contact/) ### Exterior Waterproofing $1,400 - $2,500 per crack - check Everything in injection and stitching - check Excavation to footing depth - check Delta-MS dimple membrane installation - check Weeping tile inspection and tie-in Get a Free Quote [/contact/ →](/contact/) Simple interior injection sits at the lower end. Exterior excavation, membrane installation, stitching and wall stabilisation scale toward the top. Rates are published up front with no hidden fees. Final pricing depends on site conditions, thickness, reinforcement, and finish. See the full published rate card [/pricing/ →](/pricing/) . Why choose us ## Why Choose Best Concrete Toronto for Foundation Repair? biotech ### We Find the Cause Most basement water problems start outside with grading, downspouts or a blocked weeping tile. Sealing inside without checking outside is treating a symptom. handshake ### Interior Option First Where injection genuinely solves it, we quote injection. Excavation is expensive and we recommend it when it is necessary, not by default. engineering ### Carbon Fibre, Not Steel Beams For most bowing walls, carbon-fibre stitching is less invasive, does not intrude into the room and does not need ongoing tightening. shield ### WSIB and $2M Liability Excavation next to a house is serious work. We carry full coverage and provide documentation before we start. Our process ## How Does Foundation Repair Work? 1. 1 search ### Diagnose the Water Path We trace where the water actually enters, check the grading and downspouts outside, and identify whether cracks are still moving. 2. 2 request\_quote ### Written Quote Published pricing in writing inside our 2-hour response window, with interior and exterior options where both are viable. 3. 3 construction ### Seal or Excavate Inject from inside where that solves it, or excavate to footing depth and install membrane and drainage where it does not. 4. 4 verified ### Stabilise & Finish Stitch moving cracks with carbon fibre, parge spalled above-grade walls, backfill and restore grade. Our work ## Foundation Repair Projects Across the GTA Click any image to enlarge. ## How Best Concrete Toronto Compares | Factor | Typical Contractor | Best Concrete Toronto | | --- | --- | --- | | Diagnosis | Seals the crack, ignores the cause | Traces the water path inside and outside first | | Quote turnaround | 2 to 5 business days | 2-hour response window | | Repair method | One-size epoxy patch | Hydrophobic polyurethane, epoxy or carbon-fibre stitching matched to the crack | | Interior vs exterior | Sells excavation by default | Recommends interior injection when it will genuinely work | | Workmanship warranty | 1 year or none | 2 years in writing | Testimonials ## What Customers Say About Our Foundation Repair Work 4.9 out of 5 across Google reviews star star star star star > "They stitched the cracks and explained exactly what was happening structurally rather than just selling us a waterproofing package." Marie L. Scarborough star star star star star > "Told us the leak was coming from a downspout discharging against the wall. Fixed the crack and the cause. Honest work." Nadia K. Port Credit star star star star star > "Parging on a badly spalled foundation wall. Matched the texture and it has held up through two winters of salt." Helen O. The Kingsway Common questions ## Foundation Repair FAQs ### help How much does foundation repair cost in Toronto? expand\_more Foundation repair runs $300 to $2,500 per crack depending on severity. A simple interior polyurethane injection sits at the lower end. Injection plus carbon-fibre stitching sits in the middle. Exterior excavation with dimple membrane and drainage tie-in sits at the top. ### help Should foundation cracks be repaired from inside or outside? expand\_more Interior injection is faster, cheaper and less disruptive, and it genuinely solves most single leaking cracks. Exterior excavation is warranted when there are multiple failure points, when the weeping tile is blocked or missing, when the wall is deteriorating on the outside face, or when interior repair has already been tried and failed. ### help Is a crack in my foundation serious? expand\_more Hairline vertical cracks in poured foundations are extremely common and usually shrinkage. Horizontal cracks, stair-step cracks in block walls, cracks wider than a pencil, and any crack with displacement between the two sides deserve proper assessment. We tell you which category yours falls into. ### help What causes foundation cracks in Toronto? expand\_more Clay soil expanding when wet and shrinking when dry puts cyclical pressure on foundation walls. Add frost pressure in winter, hydrostatic pressure from poor drainage, normal shrinkage in the original pour, and road-salt spalling on above-grade sections, and you have most of what we see. ### help What is carbon-fibre stitching and when is it used? expand\_more Strips or a grid of high-tensile carbon-fibre fabric bonded to the wall with epoxy, resisting further movement. It is used on moving cracks and on walls that are bowing inward but not yet critically. Compared with steel I-beams it does not intrude into the room and needs no ongoing adjustment. ### help Can you stop a leaking basement wall permanently? expand\_more Yes, when the cause is properly identified. Hydrophobic polyurethane injection seals the crack itself. If exterior water management is the underlying issue, that needs addressing too, whether that is regrading, extending downspouts, or excavating and installing membrane and drainage. ### help What is parging and why is my foundation flaking above ground? expand\_more Parging is a cement coat applied to the exposed above-grade section of a foundation wall. It flakes and spalls because that strip takes direct road salt and freeze-thaw all winter. A polymer-modified parging coat restores the surface and protects the concrete behind it. ### help Do you handle weeping tile? expand\_more During exterior work, yes. We inspect the existing weeping tile at footing level, flush or replace it where it has failed, and tie the drainage properly into the system. There is no point installing a membrane over a drain that cannot carry water away. ### help How long does foundation work take? expand\_more Interior crack injection is typically a single visit of a few hours. Injection with stitching is one to two days. Exterior excavation and waterproofing on one wall is usually three to five days depending on depth, access and weather. ### Still have questions? We answer the phone 24/7 and reply to quote requests inside two hours. Get a Free Quote [/contact/ →](/contact/) ## Related Services healing ### Concrete Crack Repair Injection repair, structural crack stitching and cosmetic sealing that anchor our repair-first promise. [Concrete Crack Repair →](/concrete-crack-repair/) home ### Concrete Porches & Front Steps Porch resurfacing, front-step restoration, coping repair and structural stitching for spalled GTA porches. [Concrete Porches & Front Steps →](/concrete-porches-front-steps/) water\_drop ### Concrete Sealing & Waterproofing Silane-siloxane, acrylic and penetrating sealers and densifiers that protect against freeze-thaw and salt. [Concrete Sealing & Waterproofing →](/concrete-sealing-waterproofing/) ![](/images/hero/concrete-crew-in-hi-vis-vests-finishing-a-large-dr.webp) 2-hour response window, 24/7 phone answering ## Ready to Book Foundation Repair? Published pricing on concrete foundation repair, a written quote inside two hours, and a 2-year workmanship warranty. request\_quote Get a Free Quote [/contact/ →](/contact/) call (647) 800-3688 [tel:+16478003688 →](tel:+16478003688) - check\_circle 2-year workmanship warranty - check\_circle No hidden fees - check\_circle WSIB insured, $2M liability