foundation CRACK REPAIRS in London, Ontario
Foundation Crack?
We are the foundation crack repair specialists. If it leaks, we waterproof it. If it’s weak, we strengthen it. No excuses, no shortcuts — just permanent results
fast & reliable service
We understand that water issues in your home require prompt attention. That’s why when it’s urgent, we’ll get a team member out to provide a quote within 48 hours or sooner.
Why Fix Foundation Cracks Right Away?
– Prevent Structural Damage
Cracks widen over time, leading to shifting walls and major foundation issues
– Stop Active Leaks:
Cracks widen over time, leading to shifting walls and major foundation issues
– Prevent Structural Damage
Cracks widen over time, leading to shifting walls and major foundation issues
Protect Property Value:
A cracked foundation is a red flag for buyers, inspectors, and lenders
lifetime warranty
All crack repairs are backed by a lifetime written warranty. If the leak returns we’ll fix it at no cost or fully refund your money.
Which Crack Repair Method Is Right for Your Home?
Exterior / Interior
Exterior Crack Repair
Repairing a foundation crack from the exterior is the most effective, permanent solution.
Our 3-part exterior crack repair system seals the crack, protects the wall, and keeps groundwater away—so water never reaches your basement.
Benefits:
-
Stops water at the source before it enters the wall
-
Prevents concrete deterioration and freeze/thaw damage
-
Helps preserve structural integrity over time
-
No interior disruption (no dust, no cutting drywall)
-
Long-lasting protection with exterior membrane & drainage layer
- Hand dug to lessen disruption caused by heavy equipment
Interior Crack repair
INTERIOR CRACK REPAIRS
When exterior access isn’t possible, interior crack repair offers an efficient and affordable way to stop water from entering your basement. These repairs seal the crack from the inside, stopping leaks and preventing further damage — fast, clean, and with no need for excavation.
Benefits:
-
Quick and cost-effective solution
-
Minimal disruption — no digging required
-
Seals cracks and stops active leaks
-
Prevents further wall deterioration
-
Ideal for finished basements or limited access areas
FOUNDATION CRACKS ONLY GET BIGGER
That tiny crack wont always be so tiny
Moisture, soil pressure, and seasonal temperature changes slowly force cracks to widen. What starts as a small line can quickly become a visible opening that allows water to enter. Addressing cracks early keeps repairs simple — and your basement dry.
Depending on the type and size of the crack, we choose the repair method that delivers the best, longest-lasting results.
This could include a polyurethane injection for active leaks, epoxy for solid structural bonding, carbon fiber reinforcement where extra support is needed, and specialized waterproofing materials designed specifically for either exterior or interior applications. Every repair uses a minimum of three layers of waterproofing, customized to your foundation and built to last a lifetime.
Over time, even minor cracks can expand and potentially lead to significant issues, including a compromise of structural integrity. It is essential to address all cracks that may be or are subject to moisture exposure immediately to prevent extensive damage.
We are A1 waterproofing
14 Years providing crack repair services
Completed Crack Repairs
0
+
serving:
CRACks repaired this year (2025)
0
+
NO downpayments
Our commitment to providing A1 service is unparalleled. We prioritize your satisfaction above all else, guaranteeing that no payment will be required until you are satisfied with the work completed. And if that’s not convincing enough, rest assured that we will happily refund your money if we are unable to resolve the issue.
our products
commercial grade Products
The products we utilize are designed for commercial use, featuring warranties that far surpass what is typically available in residential offerings.
providing:
Quick Response measures
Unforeseen crack repairs can disrupt renovation projects. Therefore, we prioritize efficiency & quick response measures to ensure your repairs are completed promptly when urgent.
unmatched:
Customer service
From the time you call to book an estimate to the completion of your project you will be in good hands with A1’s friendly and professional service.
EXT. CRACK REPAIR
INT. CRACK REPAIR
PREP – CARBON FIBRE REPAIR
Epoxy Coating – Pre Carbon Fibre
CARBON FIBRE REPAIR
Crack repairs we offer
Exterior Crack Repairs
Exterior crack repair is the most durable, long-term solution — a full three-part waterproofing system that prevents water from ever reaching your foundation
Interior Crack Repairs
Interior crack repair offers a fast, permanent solution to leaking foundation cracks — no excavation required, no mess, just lasting protection.
POLYURETHANE INJECTIONS
Polyurethane crack injection seals leaks deep within the wall. When combined with our waterproofing system, it becomes a permanent, watertight repair
CARBON FIBRE CRACK REPAIRS
High-strength carbon fibre reinforcement that stabilizes cracked foundation walls and prevents future movement — fast, clean, and permanent.
3 Common Foundation Cracks Explained
Diagonal Cracks
Diagonal cracks run along your foundation or basement wall at a 30-75 degree angle. This type of crack may be a thin hairline crack, but will likely be wider at one end than the other. Diagonal foundation cracks are caused by differential settling of a foundation, which is where one side of a home’s foundation settles lower than the rest of the foundation. This type of uneven tension then causes diagonal cracking.
Vertical Cracks
These are the most common cracks — straight up and down or nearly so. They’re often caused by settling or concrete shrinkage as it cures. While typically non-structural, they can allow water infiltration if left unsealed. Monitoring and sealing early on keeps them from growing or causing moisture problems.
Horizontal Cracks
This is the most serious class. When cracks run horizontally across a foundation wall, it often signals that soil pressure is pushing inward and the structural integrity of the wall is compromised. These must be addressed promptly with specialized solutions to restore stability and prevent collapse.
