Basement waterproofing and leak repairs are our specialty
Typical Problems we Deal with Every Day
Discovered a Basement Leak?
Finding water in your basement can be stressful—and most homeowners immediately start searching online for the best way to stop a basement leak fast. The good news is that the majority of leaks in poured concrete foundations can be repaired quickly, cleanly, and affordably with professional foundation crack injection or targeted interior waterproofing.
At AquaGuard Injection & Waterproofing®, we’ve spent more than 20 years helping homeowners across the GTA—including Aurora, Oakville, Bolton, Newmarket, Richmond Hill, and surrounding areas—fix basement leaks the right way.
Our leak repair methods permanently seal the problem, prevent future water entry, and are backed by our trusted 25-year transferable warranty.
If you’ve spotted dampness, staining, or active water in your basement, call us today—or download our Flooded Basement Action Plan to know exactly what to do next.
Choose Your Leak Type
Select the leak that matches what you’re seeing in your basement. You can also text us photos for fast advice.
Water from a Foundation CrackVertical or diagonal crack with dampness or mud staining. |
Water from a Tie-Rod HoleSmall round hole leaking where the tie-rod passed through the concrete wall. |
Water from a Window WellMud or water on the window sill from an overflowing or clogged window well. |
Water at the Cove JointSeepage where the basement wall and floor meet, often after rainfall. |
Water Over the WallLeak entering from the top of the foundation wall near the sill plate area. |
Moldy or Damaged DrywallSwollen baseboard or moldy drywall from hidden basement moisture. |
Not sure which option to pick?
Text us photos at 289-366-1577
and a technician will review them and recommend the best repair.
Frequently Asked Questions About Basement Leaks
What causes basement leaks in poured concrete foundations?
Most basement leaks originate with foundation cracks, tie-rod holes, window well drainage issues, or seepage at the wall–floor joint (cove joint). In general, hydrostatic pressure pushes groundwater through openings in your foundation during rainfall or snowmelt.
Can a basement leak be repaired from inside, or do I need exterior waterproofing?
In most cases, basement leak repairs can be done either from inside or outside. Most homeowners choose interior waterproofing repairs because they are quicker to schedule and less costly than exterior waterproofing. There are situations when it is best to waterproof on the exterior; consult one of our technicians to determine what your options are and what the best approach is.
How much does foundation crack repair cost?
Most foundation cracks in poured concrete walls can be repaired for approximately $745–$895, depending on crack length, accessibility, and width. Tie-rod hole repairs cost considerably less. At AquaGuard, the vast majority of injection repairs are backed by our 25-year transferable warranty.
How quickly can you repair a basement leak?
Most interior basement leak repairs can be completed in a single visit, often within 24–48 hours of contacting us. Time-sensitive situations, such as selling your home or an active leak during heavy rain, can often be prioritized.
Does polyurethane crack injection really work permanently?
Yes. When performed properly, high-pressure polyurethane injection fills the crack through the entire thickness of the wall. The resin expands, seals every pathway for water, and remains flexible over time to accommodate normal foundation movement. When required we stabilize cracks with carbon fibre stitches to eliminate the risk of future crack widening.
Should I fix a foundation crack even if it’s not leaking yet?
This is where AquaGuard is different than other waterproofing companies. If a crack is not leaking we believe that there is no urgency to repair it; unless you are finishing your basement or selling your home; after all, it is your home and your money, so you decide. Proactive repair tends to be more cost-effective than dealing with finished basement damage, mold, or ruined flooring after water gets in.
Will repairing my basement leak help with resale value?
Absolutely. Buyers and home inspectors pay close attention to the basement. A professionally repaired crack with documentation and a 25-year transferable warranty helps protect your home, reduces objections in negotiations, and supports resale value.
Customer Reviews for AquaGuard Injection & Waterproofing®
Rest assured that you’re dealing with a first-rate, reputable company and feel free to check out our Google reviews on one of our three locations on Google Maps. Here are some excerpts of our testimonials from just a few of our many satisfied customers since 2002:
“we called Aquaguard on Monday and emailed some photos for a quote. The quote was quite reasonable and Marco showed up Wednesday to do the work! Not only was he professional, but he also ensured we had the paperwork necessary for our 25 year warranty. We hope to never have to call them again, but if we need to, we will do so with confidence.” – Katherine
“had a foundation crack that was a small intermittent problem leak over the years, but really showed itself this 2021 fall with so much rain. The team was quick to respond and fixed the leak by squeezing this repair in because a cancellation by someone else occurred. I am very pleased with this leak fix. The cool part is that this company had previously fixed another part of the basement (under previous owners). Since I had the warranty/ documentation and was able to see that the fix was a success after all that time (10 years), it felt like a no brainer to use this company again. I do have another crack (non leaking) that I want fixed when the time is right, needless to say I will call this company again.” – Milton
“Aquaguard came to our rescue. Our house was 2 days away from being listed and we found a basement leak after a big rain storm. Fortunately, the excellent technician at Aquaguard was able to fit us in the next day and repair the foundation …” – Jonathan