Foundation and Basement Crack Repair Contractors in Toronto
Foundation cracks can develop gradually or appear suddenly after seasonal ground movement, water pressure, or structural settlement. While some cracks are cosmetic, others can allow moisture intrusion, weaken foundation walls, and create long-term structural concerns. Professional foundation crack repair identifies the cause of the damage and provides a lasting solution before the problem becomes more expensive to fix.
At Leaquida Waterproofing, we repair foundation and basement cracks using proven methods designed to restore stability, prevent water infiltration, and protect your property from future deterioration. Whether the issue involves a leaking basement wall, damaged concrete, or structural movement, our team delivers solutions tailored to the specific condition of your foundation.
Foundation Crack Repair Services for Basement and Foundation Walls
No two foundation cracks are exactly the same. The repair method depends on the crack type, its severity, and whether water is entering the structure.
foundation wall crack repair for concrete and masonry foundations;
foundation crack injection for active leaks and narrow cracks;
foundation crack sealing to prevent future water penetration;
structural crack repair for foundations affected by movement or settlement;
concrete restoration and reinforcement for damaged surfaces.
Common crack types we repair include:
Vertical Cracks – are among the most common foundation issues. They are often caused by normal settling and can usually be repaired effectively when addressed early.
Horizontal Cracks – may indicate excessive pressure against foundation walls. These cracks require immediate attention because they can signal structural stress.
Stair-Step Cracks – Frequently found in masonry walls, stair-step cracks can develop as a result of settlement, shifting soil, or foundation movement.
Hairline Cracks – Although small in appearance, hairline cracks can allow moisture to enter over time and should not be ignored.
Depending on the situation, repairs may involve crack injection, sealing systems, reinforcement materials, or additional waterproofing measures. In some cases, homeowners may also benefit from exterior waterproofing to reduce water pressure around the foundation.
Signs You Need Professional Crack Repair in Toronto, ON
Foundation problems often become worse when they are left untreated. Identifying warning signs early can help prevent extensive structural damage and costly repairs.
Common signs include:
water seepage through foundation walls;
damp or musty basement conditions;
visible cracks that continue to grow;
recurring moisture after rainfall;
bowing or shifting foundation walls;
uneven floors inside the home;
doors and windows that no longer close properly;
white mineral deposits on concrete surfaces.
When a Foundation Crack Becomes a Serious Problem?
A crack should be professionally evaluated if it shows signs of movement, widening, or recurring water penetration. Structural concerns are more likely when cracks are accompanied by wall displacement, floor settlement, or visible changes in the home’s frame.
Addressing these issues early can help avoid larger repairs and preserve the long-term value of the property.
Structural Crack Repair in Toronto
A structural crack is one that is linked to movement or pressure, not just concrete shrinkage. Horizontal cracks, cracks that keep widening, cracks with offset edges and cracks combined with bowing walls or sloping floors all need more than a sealant.
How We Repair Structural Cracks
The crack is stabilized first: epoxy injection restores the bond in poured concrete, and carbon fibre straps or other reinforcement hold the wall against further movement. Where water is also coming through, the repair is combined with waterproofing.
When Reinforcement Is Not Enough
If the inspection shows settlement or significant wall movement, crack repair alone will not solve the problem. In that case we recommend foundation structural repair, such as piering or underpinning.
Permits for Structural Work
According to the City of Toronto’s guide on when a building permit is required, structural or material alterations need a building permit. We confirm during the assessment whether your repair falls into this category.
Licensed and Insured Crack Repair Contractors
Fully licensed
Repairs planned to Ontario Building Code requirements.
Transparent process
A clear plan and price before work starts.
Insured
Your home and our crew are protected throughout the job.
Affordable
Crack injection from $600 per crack.
Foundation Crack Repair Cost in Toronto
The cost of repairing a foundation crack depends on the type of damage, repair method, accessibility, and whether structural reinforcement is required.
Project costs vary because every foundation has unique conditions. Factors such as crack size, water infiltration, structural movement, excavation requirements, and repair materials can all influence the final price.
Which Foundation Crack Repair Method Should You Choose in Toronto?
Choosing the right repair technique depends on the cause of the crack and the condition of the foundation.
Epoxy Injection – is commonly used when structural strength needs to be restored. The material bonds concrete together and helps reinforce the affected area.
Polyurethane Injection – is often recommended when water infiltration is the primary concern. The expanding material fills voids and creates a flexible waterproof barrier.
Crack Sealing Systems – Sealing methods help prevent moisture from entering through minor cracks and are frequently used as part of a comprehensive waterproofing strategy.
Structural Reinforcement – When significant movement or pressure has affected the foundation, reinforcement systems such as carbon fibre straps may be required to stabilize the structure and prevent further deterioration.
Method
Best for
What it does
Typical cost*
Epoxy injection
Dry cracks in poured concrete where strength must be restored
Bonds the concrete back together
$600–$1,500 per crack
Polyurethane injection
Cracks that let water in
Expands to fill the crack and forms a flexible waterproof seal
$600–$1,500 per crack
Crack sealing system
Minor cracks and preventive protection
Blocks moisture at the surface as part of waterproofing
$500–$2,000 per crack
Structural reinforcement (carbon fibre)
Cracks linked to movement or wall pressure
Stabilizes the wall and prevents further movement
$1,500–$5,000+ per crack
*From our price table above; the exact cost is confirmed after the assessment.
The best repair method is determined after a professional inspection that identifies both the visible damage and the underlying cause.
Foundation Wall Crack Repair: Inside or Outside?
Most foundation wall cracks can be repaired from inside the basement, but some need work on the outside of the wall. The choice depends on the wall material, how much water is coming through and whether the crack has already been repaired before.
Interior crack repair
Exterior crack repair
How it is done
Injection or sealing from inside the basement
Excavation down to the crack, repair and a new membrane on the outside
Usually chosen for
Poured concrete walls with a single leaking or dry crack
Cracks that keep leaking, or walls where pressure from outside is the main problem
Disruption
No digging outside; basement area around the crack must be accessible
Excavation of the yard or walkway next to the wall
We recommend the approach after inspecting the crack, the wall and the drainage around the house.
Concrete Floor Crack Repair in Toronto
Cracks in a basement floor are often caused by shrinkage of the slab, settlement of the soil beneath it or water pressure from below. A thin, dry crack may only need sealing, while a crack that lets in water, keeps widening or sits next to a heaved or sunken section needs a closer look at what is happening under the slab.
Typical concrete floor crack repair in Toronto costs $700–$2,000, with complete projects from $1,500 depending on the size of the damage and access. When the slab is badly damaged, replacing the affected section is often more reliable than repairing it — see our concrete floor installation service. If water is rising through the floor, the repair is usually combined with interior drainage and a sump pump.
Related Basement Waterproofing Services
EXTERIOR
Exterior waterproofing is one of most efficient and reliable ways to perform waterproofing of your property.
Toronto properties face a combination of environmental conditions that can contribute to foundation deterioration. Seasonal freeze-thaw cycles, heavy rainfall, clay-rich soils, and groundwater pressure all place stress on foundation walls over time.
Without proper maintenance, small cracks can develop into larger structural concerns that affect the stability of the building. Professional crack repair addresses these issues before they lead to extensive damage.
Some of the most common causes of foundation problems in the GTA include:
Soil expansion and contraction.
Hydrostatic pressure around basement walls.
Poor drainage conditions.
Aging concrete structures.
Improper grading around the property.
If a crack is only one sign of a wider problem — settlement, bowing walls or water around the whole foundation — our foundation repair in Toronto service looks at the entire structure, not just the visible damage.
Foundation Cracks, Radon and Indoor Air
Cracks do not only let in water. According to Health Canada, radon gas can enter a building through cracks in foundation walls and floor slabs, and radon levels are generally highest in basements. The Canadian guideline is 200 Bq/m³, and a long-term test of 3 months, ideally in fall or winter, is recommended.
Sealing cracks closes some of these entry points, but it does not replace a radon test. If your result is above the guideline, Health Canada’s radon reduction factsheet explains the next steps.
Why Choose Leaquida for Foundation Crack Repair?
Choosing the right contractor is essential when dealing with foundation damage. Our team focuses on providing reliable repairs that address the root cause of the problem rather than temporary fixes.
Homeowners trust us because we offer:
detailed foundation assessments;
proven repair methods;
transparent recommendations;
long-term waterproofing solutions;
experienced technicians and quality materials;
customized repair plans for every property.
We also understand how related drainage and moisture issues can impact foundation performance. When necessary, we can recommend complementary solutions such as proper drainage improvements, window well protection systems, and other waterproofing measures designed to reduce future risk.
If you have noticed foundation cracks, water intrusion, or signs of structural movement, contacting our team is the first step toward protecting your home and preventing further damage.
Can Foundation Cracks Be Repaired From the Inside?
Yes. Many foundation cracks can be repaired from the inside using epoxy or polyurethane injection, depending on the crack's condition and the repair objectives. Interior injection can seal water entry points without requiring exterior excavation. However, cracks associated with significant structural movement may need additional reinforcement or an exterior repair approach.
Is Epoxy or Polyurethane Better for Foundation Crack Repair?
The choice depends on whether the crack is leaking and whether structural bonding is required. Polyurethane is commonly used to seal actively leaking cracks because it expands and helps block water infiltration. Epoxy is often selected for suitable cracks where a rigid bond is needed. A professional assessment can determine which material is appropriate for the specific crack.
Can a Foundation Crack Leak Again After Repair?
Yes. A repaired crack may leak again if the original repair was unsuitable, new movement occurs, or water pressure around the foundation remains unresolved. The likelihood of recurrence depends on the crack's condition, the repair method, and surrounding drainage conditions. Identifying the cause before repair helps reduce the risk of future water intrusion.
Can Basement Floor Cracks Be Repaired Without Replacing the Concrete?
In many cases, yes. Suitable cracks in basement concrete floors can be repaired using injection materials, crack fillers, or other methods selected according to the crack's condition. However, cracks caused by ongoing settlement, slab movement, or persistent groundwater pressure may require additional investigation. The repair method should address the underlying problem rather than simply conceal the crack.
Do Foundation Cracks Need to Be Repaired Before Waterproofing?
Cracks that allow water to enter should generally be assessed and addressed as part of a waterproofing project. Sealing the crack may be sufficient for an isolated leak in a stable foundation, while recurring seepage may require drainage improvements or exterior waterproofing. If the crack indicates structural movement, stabilization may be necessary before applying waterproofing materials.
How Long Does Foundation Crack Repair Take?
Many straightforward crack injection repairs can be completed within a few hours, although preparation and curing requirements vary by material. More extensive repairs involving excavation, membrane installation, or structural reinforcement may take several days or longer. The timeline depends on the crack's location, accessibility, condition, and the repair method selected.
Can Foundation Crack Repair Be Done During Winter in Toronto?
Some foundation crack repairs can be completed during winter, particularly interior repairs performed under controlled conditions. However, low temperatures and moisture can affect material application, curing, and exterior excavation. The feasibility of winter repairs depends on the selected products, site conditions, and manufacturer requirements.
How Can I Prevent Foundation Cracks From Getting Worse?
Preventive measures include maintaining proper drainage around the house, directing downspouts away from the foundation, and correcting areas where water accumulates near basement walls. It is also important to monitor existing cracks for changes in width or displacement. If a crack continues to grow or is accompanied by wall movement, a professional assessment can help identify the cause and determine the appropriate repair.
Reviews about us
Quick, professional and at very reasonable cost. No hidden costs. The installation was complicated as the municipal sewage backed up when the pipe was cut, but the team did not complain despite working in harsh conditions.
Lev, WhitbyVacancy
Leaquida Waterproofing was prompt, courteous and thorough. We would recommend to anyone. We had a backwater valve installed. I called Sunday, got a quote Monday, has the work done the following Monday (including issuing of building permit).
Trisha GrantVacancy
They have installed sump pump system in our house. They were very much on time and during the installation they have worked very clean.
You may rely on their advises.
Highly recommended.
