Fissure Fondation Inc / Fissure Tomassini

The ultimate solution for foundation repair

Our certificates

Founded in 1975, a member of the ICRI (International Concrete Repair Institute), and ISO 9000 certified, Fissure Fondation inc. / Injection Tomassini specializes in the injection of concrete cracks and resolving foundation issues.

Manufacturer of injection systems for over 40 years.

The efficiency of our injection systems and the quality of our synthetic resins allow us to guarantee our crack repairs for 20 years.

The product is non-toxic, contains no solvents, emits no odor, and firmly adheres to the walls, preventing any possibility of water infiltration permanently and without excavation.

About the company
injection procedure
Injection of micro-cracks
Our guarantee

An exclusive process

By drilling at 45 degrees, our process ensures complete saturation of cracks or expansion joints.

Foundation crack

Pipe contour injection

Injection molding

Underground parking crack injection

Injection crack on gas station floor

Crack injection on pumping station

Crack injection on water tank

Footing injection

This product can be applied at any temperature.

Research and technology

A large part of the budget is reinvested in research and development This results in the most efficient injection equipment available in Quebec!

In 2015, the company created its first series production of high-performance injection pumps, unique to the company.

Injection port manufactured by the company. Withstands pressures significantly higher than what is offered on the market.

Rigorous control of the injection resins used

Installation of injection ports on gas station apron

We are a constantly evolving company.

Fissure Foundation created the injection systems used on the joints of the LH Lafontaine tunnel over 23 years ago!

In business since 1975!

Fissure Fondation inc. / Injection Tomassini certified ISO 9002

Injection in the Lafontaine tunnel

A company that knows how to seal leaks

President's word

When I founded the company more than 40 years ago, my biggest challenge was to manufacture an injection system whose efficiency ensured complete saturation of cracks on concrete structures in order to eliminate destruction of properties caused by excavation. To do this, a large part of the company’s budget has been reinvested in research and development, resulting in the development of an injection system whose efficiency allows us to inject cracks twice as thin. than a sheet of paper in a 36 in. foundation, or 1m thick.

This feat motivated me to obtain an ISO 9000 certification. In conclusion; when perfection remains an obsession we remain in constant evolution. Thank you to all our customers and future customers for helping to make our company a great success.

Roger Tomassini, Founding President

Need a crack expert?

If you detect the presence of cracks in your home, the best thing to do is to call a crack expert to determine if you have active or passive cracks. Whether shrinkage cracks or other types, the Foundation Fissure team can repair concrete cracks quickly and professionally!


Serving our customers for over 46 years.

What services are offered by Fissure Foundation?

Fissure Fondation can handle the repair of cracks and micro-cracks of all kinds, such as shrinkage cracks and structural cracks.

  • Shrinkage cracks can be caused by poor protection against weather conditions, especially humidity, or by shrinkage of the material itself. If the sealing of the wall is poor, moisture accumulates and can cause mold and the appearance of cracks. If you observe cracks between 0.2 and 2 mm wide in your foundations, call a contractor like Fissure Fondation for an inspection!
  • Structural cracks tend to be more severe and can indicate a high risk of collapse due to shifting foundations. The direction of cracks helps determine their cause, for example oblique and vertical cracks often indicating foundation problems. In the event of structural problems, a quick and good quality repair is essential to maintain the integrity of the building! In the event of structural problems, a quick and good quality repair is essential to maintain the integrity of the building!
Contact us for our foundation crack repair service!

Why choose our exclusive concrete injection process?

Fissure Fondation uses an exclusive injection process for the repair of cracks in concrete structures, offering many advantages to homeowners who need to repair their foundations.

No excavation necessary!

Repairing foundation cracks usually requires excavation along the foundation, which can cause significant damage to the building. Our 45-degree injection technology eliminates damage or destruction to your foundations for such strong and long-lasting results.

Fast and efficient process

Foundation crack repair is done using injections in the center of the concrete structure. Holes are made using a drill to inject exactly in the center of your foundation, which ensures an even and solid application of our product. With a significant portion of our income reinvested in research, our concrete structure injection service is the most efficient in Quebec!

Installation possible in all temperatures

Don’t wait to contact Fissure Fondation! Our team of concrete structure injection experts can repair your foundations all year round: the product can be injected safely in all temperatures, thanks to our state-of-the-art equipment.

Safe and non-toxic product

The product injected into the foundations is non-toxic, contains no solvents, and gives off no odor for quick and safe application. No need to leave your house! The injection product attaches firmly to the walls, preventing any possibility of water infiltration permanently.

What causes foundation cracks?

1. The natural aging of the building

As a property ages, it is common to see cracks appear due to structural movement and degradation of materials. Yes, even concrete has a limited lifespan: after several decades, it begins to weaken.

2. The effect of freezing and thawing on concrete

In winter, the expansion of water naturally present in the earth can put pressure on the walls of a house. This pressure can lead to the formation of cracks, which increase in size depending on the severity of the frost. It is therefore advisable to move water sources, such as gutters, away from the house if possible.

3. Soil subsidence under and around the building

Land subsidence can be caused by urban development, low soil bearing capacity and drought. Clay soils can become particularly fragile during periods of drought, which can cause cracks in properties and damage to house foundations. Fortunately, it is rather rare in Quebec!

4. Water infiltration in the foundations

The action of water can have significant consequences on the foundations of a building, particularly in regions where there is significant freezing and thawing. Water infiltration can permanently damage foundation walls if homeowners don’t do a quick crack repair.

What are the different types of foundation cracks?

Beyond aesthetics, the presence of a crack on a wall can have multiple impacts. While some are not serious, others can compromise the entire frame.

There are three types of foundation crack: microcracks, light cracks and deep cracks


A superficial crack is called a “microcrack”. With a width of less than 0.02 mm, the microcracks remain superficial and only affect the coating of the foundation. They are not dangerous, but should be monitored for potential problems (they can leak water and cause moisture problems!). Watch them closely to make sure they are not the first signs of a more serious problem.

Fine or light cracks

This type of crack is less than 2mm wide. Several factors may be involved, but it is most often shocks or non-serious damage. However, it is important to repair and monitor them. Indeed, if they extend, they can weaken the house.

Deep cracks

Beyond 2mm in width, we speak of a deep and dangerous crack. Most cross the wall from side to side and are presented in steps, because they follow the layout of the breeze blocks. These are worrisome, as they are usually due to a deeper soil problem or structural defect. However, they can compromise the balance of the entire home. In this case, it is imperative to act quickly by calling on an expert before their size is counted in centimeters!

Take foundation cracks in your home seriously!

Cracks in masonry should be monitored as they can become dangerous or conceal a more serious underlying problem. Even seemingly small cracks can indicate structural issues that have yet to surface, so it’s important to be aware of their development and take action if necessary.

When to worry about a crack in the foundation of our house?

Passive cracks

A crack can be considered a passive crack if they do not get worse over time. These cracks are often part of a home’s natural aging process and are therefore minor. To repair a passive crack, a simple filling should do the trick.

Active cracks

An active fissure may be more difficult to treat. If the crack deteriorates over time, it is important to call a professional. This expert can identify the source of the problem and take steps to resolve it. Often, active cracks are due to freezing, poor drainage, or ground subsidence.

What are the most popular repair products for concrete foundations?


Epoxy is a type of glue that can be used to seal the crack. However, due to its rigidity, it may not remain effective if the house continues to move, which may result in a new crack appearing near the original location.


Polyurethane is characterized by greater flexibility than epoxy and offers hydrophilic properties, reacting with water to form a control seal. This process injects the polyurethane into the crack with a hydraulic pump, which ensures that the polyurethane penetrates deep into the crack.