Mississauga Homeowners: Stop Basement Leaks Without Excavation
Most leaking foundation cracks in poured concrete foundation walls can be permanently sealed from the inside using polyurethane injection — usually without digging, with fast scheduling and a 25-year written, transferable warranty.
AquaGuard Injection & Waterproofing — visit our homepage for service details, warranties, and real repair examples.
- Interior crack injection (polyurethane) for active leaks
- Tie-rod hole leak sealing & waterproofing
- Exterior basement waterproofing when conditions require it
Basement leak repair services we provide in Mississauga
Below are our core services. These pages explain what each repair looks like, when it works best, and what to expect on repair day.
Foundation Crack Repair (Polyurethane Injection)
Best for leaking vertical or diagonal cracks in poured concrete walls — a permanent interior seal for active water entry.
Tie-Rod Hole Leak Repair
Stops leaking tie-rod holes (common in poured concrete basements) using professional injection and sealing methods.
Exterior Basement Waterproofing
When conditions require excavation — such as exterior deterioration or access issues — we waterproof from the outside.
Not sure what’s leaking?
The fastest way to identify the problem and the right fix is a couple of photos. Text pictures to 289-366-1577 and tell us the nearest major intersection in Mississauga.
Common causes of basement leaks in Mississauga homes
Basement leaks often appear after heavy rain, snowmelt, or freeze-thaw cycles. In many Mississauga neighbourhoods, we see leaks caused by hydrostatic pressure, foundation cracking, and failed patch repairs.
- Leaking foundation cracks (vertical or diagonal)
- Tie-rod hole leakage — damp spots or active dripping
- Cold joints / cove joints at the floor-to-wall seam
- Window well or above-grade entry
- Leaking pipe penetrations
- Old patch repairs that fail after major rains
How our Mississauga crack injection process works
1) Diagnose the leak
We confirm the water entry path (through the foundation vs. over it) and identify whether the issue is a crack, tie-rod hole, joint, or plumbing-related.
2) Prepare the area
Injection packers are installed and the crack surface is sealed with epoxy to direct material through the full depth of the wall.
3) Inject polyurethane
Urethane expands and bonds, sealing active water pathways and forming a long-term waterproof barrier.
4) Clean finish & warranty
We leave a clean result and provide clear documentation outlining the repair and warranty coverage.
Get help fast
If you can share 2–3 photos and the nearest major intersection in Mississauga, we can usually identify the issue and recommend the right next step.