Foundation Crack Repair Contractor in Toronto
With its 2.8 million inhabitants, Toronto is home to an exceptional variety of real estate heritage: century-old Victorian houses in the Annex, brownstones in Cabbagetown, post-war bungalows in Don Mills, duplexes in Leslieville and residential towers in the downtown core. This diversity of structures shares one thing in common: the clay soils of the Lake Ontario basin, intense freeze-thaw cycles and differential settlement eventually cause cracks in the concrete foundations.
At Fissure-Expert, our technicians serve the entire Greater Toronto Area: Downtown, North York, Scarborough, Etobicoke and East York. High-pressure polyurethane injection, exterior waterproofing, French drain — we use the technique adapted to each type of crack, with a written and transferable 10-year warranty. Request your quote online.
Our expertise at your service
You will be able to take advantage of all the expertise of Groupe Fissure Expert and see all the difference in quality on our repairs! For any questions or interventions on the cracks of your home in the GTA, contact one of our experienced technicians at Groupe Fissure Expert inc.
Interior Foundation Crack on Concrete Foundation in Toronto
In the basements of homes in Rosedale, Beach or Forest Hill, the interior foundation crack is a warning sign that should not be underestimated. It can be a sign of a compaction of the clay soil characteristic of the Lake Ontario region, a defect in the pouring of concrete, or simply the cumulative effect of freeze-thaw cycles on a foundation that is more than 80 years old.
Our team intervenes by high-pressure injection of flexible polyurethane, a technique that allows both to seal the fault and to maintain the waterproofing over the long term. For inactive cracks, we use epoxy instead, which restores structural strength.
Waterproofing of exterior foundation cracks in Toronto
An untreated exterior crack quickly becomes a gateway for water, which is particularly dreadful in Toronto where annual rainfall exceeds 830 mm and the water table remains high along Lake Ontario. In neighbourhoods such as High Park, Parkdale or The Junction, homeowners frequently see seepage into the foundation after spring thaws.
Our exterior waterproofing process combines targeted excavation around the crack, the installation of a self-adhesive elastomeric membrane and, if necessary, the re-extraction of the French drain at the foot of the foundation. This solution treats the cause at the source, where internal injection is no longer sufficient.
Window Corner Crack Repair in Toronto
Window corners concentrate stresses: this is where concrete splits most often, whether in a Victorian house in Cabbagetown, a semi-detached house in Leslieville or a bungalow in Willowdale. A window locally weakens the strength of the wall, and the shrinkage of the concrete on drying combined with seasonal movements ends up opening an oblique crack starting from the top or bottom corner.
Our intervention combines the high-pressure injection of flexible polyurethane, which absorbs micro-movements, and — if the crack opens to the outside — the installation of an elastomeric membrane. Our teams travel throughout the GTA, including North York, Scarborough and Vaughan.
Floor Crack Repair in Toronto
In the underground garages of Rosedale homes or in the finished basements of Don Mills, it is not uncommon to see cracks appear on the concrete slab. There are many causes: overloading, shrinkage of the concrete drying, poor compaction of the backfill, or movement of pyrite for older constructions.
Crack repair on concrete slabs involves an injection of epoxy for stabilized cracks, or polyurethane for those that continue to work. Left untreated, the floor crack becomes a water infiltration route and a nest of mold.
Concrete Joint Repair in Toronto
The cold joint, also known as a return joint, is formed when two successive concrete pours are spaced out in time. Visually, it looks like a perfectly straight horizontal crack, and its hydraulic behaviour is the same: water infiltrates as soon as the hydrostatic pressure rises, which is common underground in Toronto after the snow melts.
Only an expert eye can distinguish a concrete joint from a structural crack. Our technicians carry out a precise diagnosis, then proceed with the sealing by high-pressure injection following a rigorous protocol: drilling spaced along the joint, cleaning, plastering of surface epoxy, installation of mechanical ports, then injection of flexible polyurethane from bottom to top.
Concrete Holes Honeycomb Repair in Toronto
Honeycombs in the concrete signal poorly vibrated pouring during construction — a relatively common defect in the post-war bungalows of the Don Mills, East York or Scarborough Bluffs neighborhoods, where the rapid urbanization of the 1950s and 1970s did not always follow best practices in implementation.
These cavities create preferential paths for moisture and weaken the foundation locally. Depending on the depth and surface of the defect, we intervene by filling with hydraulic repair mortar, epoxy sealing or injection of expanding polyurethane. Our certified contractors identify the most economical technique while guaranteeing the durability of the result.
Concrete Pool Crack Repair in Toronto
The in-ground concrete pools, which are numerous in the backyards of Forest Hill, Lawrence Park or Thornhill, sooner or later end up cracking. Winter frost, movements of the clay soil and variations in hydraulic load between the swimming season and wintering put intense strain on the concrete shell.
Our method: detection of the exact origin of the leak by dye test and observation of the drop in level, then injection of polyurethane or epoxy depending on the width of the crack and its location. For visible cracks inside the pool, we combine the injection with a chlorine-compatible waterproofing coating.
Which repair technique to choose in Toronto?
Each type of crack requires a specific intervention method. Here is a comparison of the three techniques we use most frequently on residential foundations in the Greater Toronto Area.
| Technique | Type of crack treated | Intervention | Average | durationWarranty |
|---|---|---|---|---|
| polyurethane injection | Active crack with water | infiltrationInterior | 2 to 4 hours | 10 years transferable |
| Epoxy Injection | Inactive | Structural CrackInterior | 2 to 4 hours | 10 years transferable |
| Elastomeric membrane + French | drainExterior crack, major | infiltrationExterior (excavation) | 1 to 2 days | 10 years transferable |
Frequently Asked Questions About Crack Repair in Toronto
How long does a crack repair intervention take in Toronto?
A high-pressure injection of polyurethane or epoxy takes an average of 2 to 4 hours per crack. Exterior waterproofing with excavation takes 1 to 2 days depending on the accessibility of the land. In most cases, you can reoccupy your basement the same day.
What neighbourhoods in Toronto and GTA do you serve?
Our technicians cover the entire GTA (Downtown, North York, Scarborough, Etobicoke, East York) as well as the surrounding suburbs, including Mississauga and Brampton.
What is the difference between polyurethane injection and epoxy injection?
Polyurethane is flexible: it absorbs the micro-movements of a crack that continues to work under the effect of freeze-thaw. Epoxy is rigid and restores the structural strength of a stabilized crack. Our technician determines the right solution during the preliminary inspection.
Are your repairs guaranteed?
yes. All our interventions are covered by a written and transferable 10-year warranty. If you sell your home, the warranty is passed on to the next owner — an argument appreciated for resale.
Do you work on commercial foundations and condo buildings?
Yes, we handle single-family residential foundations as well as multi-unit building foundations and underground parking slabs. Request your quote online by describing your situation and we will get back to you within 24 hours.