A crack in the foundation is never trivial — active or inactive, vertical or horizontal, it's a structural weak point and a path for water. Our high-pressure injection method seals the crack permanently, in the vast majority of cases without excavation.
⚠️ Crack in your foundation? Fast service available → (514) 730-7107
12 years
warranty
500+
cracks repaired
1 day
job duration
Epoxy / PU
certified products
Understanding
What is crack repair by injection?
Crack injection means pumping a resin — epoxy or polyurethane — into the crack under high pressure through ports drilled along the concrete edge. The resin fills the entire crack and hardens, permanently sealing the path for water.
This high-pressure injection method treats foundation cracks from inside the basement, without excavation in the vast majority of cases. The result: a clean, fast job with no impact on your landscaping.
→High-strength epoxy for dry cracks — restores structural strength
→Expanding polyurethane for wet cracks — reacts on contact with water
→High-pressure injection — fills the entire crack through its full thickness
→In the vast majority of cases: zero excavation, a one-day job
95%
of foundation cracks can be
repaired by injection, without excavation. Acting quickly prevents the crack from widening and causing costly structural damage.
Same-day service possible12-year warranty — high-pressure epoxy and polyurethane
Recognizing the problem
How to spot a crack that needs attention
Not all cracks are the same. Here are the signs that should trigger an immediate inspection.
Vertical crack in the concrete
Vertical cracks are common in poured concrete foundations. Often caused by the concrete shrinking as it cures, they become a concern if they let water in or widen.
Diagonal crack at 45°
Stair-step or 45° cracks often point to uneven settling of the foundation. They need an urgent professional assessment to evaluate the structural impact.
Horizontal crack — a serious sign
A horizontal crack is the most serious warning sign — it signals excessive lateral pressure pushing the foundation wall inward. Structural work is needed without delay.
Active leak through the crack
Water seeping or flowing through a crack is an emergency. Expanding polyurethane resin stops the leak instantly — even under water pressure.
Crack that keeps widening
A growing crack means the structure is actively moving. It must be treated quickly to keep the problem from getting worse and becoming structural.
Efflorescence around a crack
White deposits around a crack show that water has been passing through the concrete for a while. The crack is an established path for water and needs injection treatment.
Our method
Injection repair in 5 steps
A precise, clean and lasting job — often finished the same day.
01Step 01
Inspection and classification
We identify the type of crack (active, inactive, structural), its depth and its extent, and choose the right injection product.
02Step 02
Cleaning and preparation
Mechanical brushing and compressed-air cleaning of the crack, removing dust and debris to ensure maximum resin adhesion.
03Step 03
Installing injection ports
Steel injection ports are drilled and spaced according to the crack's depth, then sealed to drive the resin through the full thickness of the wall.
04Step 04
High-pressure injection
Resin (epoxy or polyurethane depending on the type) is injected under controlled pressure, from the bottom up. It penetrates and fills the entire crack.
05Step 05
Finishing and quality control
Ports removed, surface smoothed and full visual inspection. Watertightness checked and warranty file handed over.
What's the difference between epoxy and polyurethane injection?
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Epoxy is used for dry, inactive cracks — it bonds the two sides of the concrete and restores structural strength. Polyurethane (PU) is used for wet or active cracks — it reacts with water and expands to seal the leak instantly. Our technicians choose the right product for each situation.
Can a crack be repaired while water is actively flowing?
+
Yes. Expanding polyurethane resin injection is designed for exactly this. The resin reacts with water, expands and plugs the crack within minutes. It's an urgent job we handle as a priority.
How much does foundation crack repair cost in Montreal?
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The cost depends on the type of crack, the injection product needed and access. Contact us for a free on-site quote, with no obligation.
How long does crack injection repair take?
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The vast majority of cracks are treated in one day. Polyurethane resin cures in 15 to 30 minutes, epoxy in 24 hours. You can use your basement again the same day or the next.
Is injection repair permanent?
+
Yes, for stable cracks. We offer a 12-year warranty on injection repair. For active cracks (structural or caused by ground movement), follow-up may be recommended.
Do you need to excavate to repair a foundation crack?
+
In the vast majority of cases, no. High-pressure injection is done from the inside, with no excavation. It's a clean, fast, minimally invasive job — with no impact on your landscaping.
How do you tell a structural crack from a cosmetic one?
+
A cosmetic crack is shallow, stable and doesn't affect the foundation's strength. A structural crack keeps widening, runs horizontally, or comes with the wall shifting. Our technicians classify every crack during the quote visit.
Real results
Cracks repaired, basements restored
Crack repair
★★★★★
"A crack with active water in the middle of March. The team came the day after I called. It was fixed in 3 hours. Not a trace in 2 springs since."
RL
Renée L.
Brossard
Epoxy injection
★★★★★
"I had a vertical crack with signs of moisture. After the inspection, they recommended epoxy injection. Clean, fast, no excavation. The result is perfect."
AM
André M.
Longueuil
Polyurethane injection
★★★★★
"Two diagonal cracks that had worried me for years. A complete diagnosis and the right treatment for each one. The visual inspection is free and there's no pressure."
CB
Caroline B.
Repentigny
Fix your crack before it gets worse
Free, no-obligation quote — same-day service possible.
*
The warranty covers only workmanship defects and construction flaws related to the work performed by Fissure et Drain XT. It does not cover damage caused by ground movement, soil defects, earthquakes, exceptional flooding, work done by third parties or any unauthorized modification after the work is completed. Warranty transferable to the new owner upon written notice. RBQ 5863-7364-01.
RBQ 5863-7364-01
12-year warranty*
