Foundation Crack Repair in Ajax & Durham Region
Epoxy and polyurethane injection that seals foundation cracks from the inside out — typically from $400, most cracks fixed in half a day.
Signs Your Foundation Crack Needs Attention
Not every crack is an emergency — but every crack deserves a look. Call us if you notice:
- Water seeping through a crack during rain or spring thaw
- White, chalky residue (efflorescence) along a crack line
- Cracks wider than a credit card edge — or getting wider year over year
- Horizontal cracks or stair-step cracking in block foundations
- Musty smells or damp spots near the base of foundation walls
Freeze-thaw makes cracks worse. Durham Region's winters open small cracks a little wider every year. A $400 injection today beats a $15,000 waterproofing job later.
How We Repair Cracks: Injection Methods
We seal cracks from the inside using professional injection — no excavation, no mess, no tearing up your yard.
- Epoxy injection — bonds the concrete back together, restoring the wall's original structural strength. Best for dry, structural cracks.
- Polyurethane injection — flexible foam that expands to fill the full depth of the crack and stops active water flow on contact. Best for leaking cracks.
During the free inspection we determine which method your crack needs — many homes need only one visit.
Our Repair Process
- Free inspection. We examine the crack, check for water entry, and confirm injection is the right fix (we'll tell you honestly if it isn't).
- Fixed written quote. Typically from $400 per crack. The quote is the price — no surprises.
- Injection day. We clean the crack, set injection ports, and pump in epoxy or polyurethane under controlled pressure until the crack is filled through the full wall depth.
- Cure & verify. The material cures fast. We verify the seal, clean up, and walk you through the lifetime transferable warranty.
Most single cracks are done in half a day, and you can use your basement normally the same evening.
Typical Cost
Foundation crack injection typically starts from $400 per crack. Final pricing depends on crack length, width, accessibility and whether water is actively flowing. Your free on-site inspection gives you an exact fixed quote — that's the number you pay.
Foundation Crack Repair FAQ
A properly injected crack is sealed through the full depth of the wall and becomes stronger than the surrounding concrete (epoxy) or permanently flexible and watertight (polyurethane). Our injection work is covered by our lifetime transferable warranty.
As a rule of thumb: dry cracks that need structural bonding get epoxy; actively leaking cracks get polyurethane, which stops water on contact and flexes with minor foundation movement. We'll confirm the right method at your free inspection.
Most single cracks are completed in half a day, including setup and cleanup. Multiple cracks may take a full day. There's no excavation and no heavy equipment inside your home.
Yes — once the crack is sealed and verified, it's safe to frame and drywall over. If you're planning a full basement finishing project and have broader moisture issues, ask us about interior waterproofing first so you only open the walls once.
Some situations — widespread seepage, failed exterior membranes, bowing walls — need more than injection. If that's what we find, we'll explain why and quote the right solution, whether that's an interior drainage system or exterior waterproofing. We'll never sell you an injection that won't hold.
Related Services
That Crack Won't Fix Itself
Free inspection, fixed written quote, most repairs done in half a day. Serving Ajax, Pickering, Whitby, Oshawa & Scarborough.